Water Body Name: | Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
Water Body ID: | CAR2064002020210519030609 |
Water Body Type: | River & Stream |
DECISION ID |
144615 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
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Pollutant: | Allethrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 277416 | ||||
Pollutant: | Allethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Allethrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for Allethrin is the USEPA Aquatic Life Benchmark of 1.05 ug/L for an invertebrate (acute). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2018-11-23 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 277399 | ||||
Pollutant: | Allethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Allethrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for Allethrin is the USEPA Aquatic Life Benchmark of 1.05 ug/L for an invertebrate (acute). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2018-11-23 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 277400 | ||||
Pollutant: | Allethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Allethrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for Allethrin is the USEPA Aquatic Life Benchmark of 1.05 ug/L for an invertebrate (acute). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2018-11-23 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 277396 | ||||
Pollutant: | Allethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Allethrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for Allethrin is the USEPA Aquatic Life Benchmark of 1.05 ug/L for an invertebrate (acute). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2018-11-23 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144625 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Bifenthrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded. |
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LOE ID: | 280365 | ||||
Pollutant: | Bifenthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Bifenthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 280577 | ||||
Pollutant: | Bifenthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Bifenthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144627 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
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Pollutant: | Cyfluthrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded. |
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LOE ID: | 283314 | ||||
Pollutant: | Cyfluthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 283379 | ||||
Pollutant: | Cyfluthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 283294 | ||||
Pollutant: | Cyfluthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 283270 | ||||
Pollutant: | Cyfluthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144629 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Cyhalothrin, Lambda |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded. |
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LOE ID: | 284425 | ||||
Pollutant: | Cyhalothrin, Lambda | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Lambda-cyhalothrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 284322 | ||||
Pollutant: | Cyhalothrin, Lambda | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Lambda-cyhalothrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 284302 | ||||
Pollutant: | Cyhalothrin, Lambda | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Lambda-cyhalothrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 284364 | ||||
Pollutant: | Cyhalothrin, Lambda | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Lambda-cyhalothrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144626 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Cypermethrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded. |
|
|||||
LOE ID: | 283141 | ||||
Pollutant: | Cypermethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283501 | ||||
Pollutant: | Cypermethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283159 | ||||
Pollutant: | Cypermethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283593 | ||||
Pollutant: | Cypermethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144628 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Deltamethrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded. |
|
|||||
LOE ID: | 283736 | ||||
Pollutant: | Deltamethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283475 | ||||
Pollutant: | Deltamethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283473 | ||||
Pollutant: | Deltamethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283759 | ||||
Pollutant: | Deltamethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144631 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Esfenvalerate/Fenvalerate |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded. |
|
|||||
LOE ID: | 283494 | ||||
Pollutant: | Esfenvalerate/Fenvalerate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Esfenvalerate | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283500 | ||||
Pollutant: | Esfenvalerate/Fenvalerate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Esfenvalerate | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283478 | ||||
Pollutant: | Esfenvalerate/Fenvalerate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Esfenvalerate | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283493 | ||||
Pollutant: | Esfenvalerate/Fenvalerate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Esfenvalerate | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144630 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Fenpropathrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 283689 | ||||
Pollutant: | Fenpropathrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fenpropathrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.0015 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2018-11-23 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283691 | ||||
Pollutant: | Fenpropathrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fenpropathrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.0015 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2018-11-23 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283713 | ||||
Pollutant: | Fenpropathrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fenpropathrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.0015 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2018-11-23 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283670 | ||||
Pollutant: | Fenpropathrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fenpropathrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.0015 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2018-11-23 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144616 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Fipronil Desulfinyl |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 284045 | ||||
Pollutant: | Fipronil Desulfinyl | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Desulfinyl. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil desulfinyl is the USEPA Aquatic Life Benchmark of 0.54 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 284065 | ||||
Pollutant: | Fipronil Desulfinyl | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Desulfinyl. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil desulfinyl is the USEPA Aquatic Life Benchmark of 0.54 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283838 | ||||
Pollutant: | Fipronil Desulfinyl | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Desulfinyl. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil desulfinyl is the USEPA Aquatic Life Benchmark of 0.54 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 284063 | ||||
Pollutant: | Fipronil Desulfinyl | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Desulfinyl. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil desulfinyl is the USEPA Aquatic Life Benchmark of 0.54 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144632 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Fipronil Sulfide |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 283984 | ||||
Pollutant: | Fipronil Sulfide | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Sulfide. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil sulfide is the USEPA Aquatic Life Benchmark of 0.83 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283962 | ||||
Pollutant: | Fipronil Sulfide | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Sulfide. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil sulfide is the USEPA Aquatic Life Benchmark of 0.83 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283963 | ||||
Pollutant: | Fipronil Sulfide | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Sulfide. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil sulfide is the USEPA Aquatic Life Benchmark of 0.83 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283919 | ||||
Pollutant: | Fipronil Sulfide | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Sulfide. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil sulfide is the USEPA Aquatic Life Benchmark of 0.83 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144633 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Fipronil Sulfone |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 283844 | ||||
Pollutant: | Fipronil Sulfone | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Sulfone. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil sulfone is the USEPA Aquatic Life Benchmark of 0.037 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283824 | ||||
Pollutant: | Fipronil Sulfone | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Sulfone. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil sulfone is the USEPA Aquatic Life Benchmark of 0.037 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283779 | ||||
Pollutant: | Fipronil Sulfone | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Sulfone. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil sulfone is the USEPA Aquatic Life Benchmark of 0.037 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 284088 | ||||
Pollutant: | Fipronil Sulfone | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Fipronil Sulfone. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for fipronil degradate fipronil sulfone is the USEPA Aquatic Life Benchmark of 0.037 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144634 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Permethrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded. |
|
|||||
LOE ID: | 286609 | ||||
Pollutant: | Permethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286520 | ||||
Pollutant: | Permethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286634 | ||||
Pollutant: | Permethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286611 | ||||
Pollutant: | Permethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144617 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | T-Fluvalinate |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 288312 | ||||
Pollutant: | T-Fluvalinate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for T-Fluvalinate. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for tau-fluvalinate is the USEPA Aquatic Life Benchmark of 0.064 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 288292 | ||||
Pollutant: | T-Fluvalinate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for T-Fluvalinate. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for tau-fluvalinate is the USEPA Aquatic Life Benchmark of 0.064 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 288311 | ||||
Pollutant: | T-Fluvalinate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for T-Fluvalinate. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for tau-fluvalinate is the USEPA Aquatic Life Benchmark of 0.064 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 288308 | ||||
Pollutant: | T-Fluvalinate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for T-Fluvalinate. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for tau-fluvalinate is the USEPA Aquatic Life Benchmark of 0.064 ug/L for a fish (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144621 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Temperature, water |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollution |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Zero samples exceeded the objectives, guidelines, or criteria for beneficial uses applicable to this water segment-pollutant combination, which is less than the minimum number of exceedances needed to place the water segment on the section CWA section 303(d) List for conventional or other pollutants (Table 3.2 of the Listing Policy). The data used satisfies the data quality requirements (section 6.1.4) and data quantity requirements (section 6.1.5) of the Listing Policy. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 298743 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Fish Migration | ||||
Number of Samples: | 7 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. The temperature of any cold or warm freshwater habitat shall not be increased by more than 5 degrees F (2.8 degrees C) above natural receiving water temperature. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Scientific literature reviewed by the Washington Department of Ecology and U.S. EPA indicates that stream temperatures higher than 21C are associated with avoidance behavior and migration blockages in steelhead trout. | ||||
Guideline Reference: | EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. Region 10 Office of Water, Seattle, WA | ||||
Guideline Reference: | U.S. Environmental Protection Agency (USEPA). 2001. Issue Paper 1: Salmonid Behavior and Water Temperature Prepared as Part of EPA Region 10 Temperature Water Quality Criteria Guidance Development Project. Region 10, Seattle, WA. EPA-910-D-01-001 May 2001. | ||||
Guideline Reference: | Washington State Department of Ecology (WDOE). 2002. Evaluating Standards for Protecting Aquatic Life in Washington’s Surface Water Quality Standards: Temperature Criteria. Draft Discussion Paper and Literature Summary. Publication Number 00-10-070. | ||||
Guideline Reference: | Beschta RL, Bilby RE, Brown GW, Holtby LB, Hofstra TD. 1987. Stream temperature and aquatic habitat: Fisheries and forestry interactions. In: Salo EO, Cundy TW, eds. Streamside management: forestry and fishery interactions. College of Forest Resources, University of Washington, Seattle. Contribution No. 57. Proceedings of a Symposium held at University of Washington, February 12-14, 1986, pp. 191-231. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT035 (Nathanson Creek at south boundary of AHMS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-21 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 298904 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Fish Migration | ||||
Number of Samples: | 19 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 19 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. The temperature of any cold or warm freshwater habitat shall not be increased by more than 5 degrees F (2.8 degrees C) above natural receiving water temperature. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Scientific literature reviewed by the Washington Department of Ecology and U.S. EPA indicates that stream temperatures higher than 21C are associated with avoidance behavior and migration blockages in steelhead trout. | ||||
Guideline Reference: | EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. Region 10 Office of Water, Seattle, WA | ||||
Guideline Reference: | U.S. Environmental Protection Agency (USEPA). 2001. Issue Paper 1: Salmonid Behavior and Water Temperature Prepared as Part of EPA Region 10 Temperature Water Quality Criteria Guidance Development Project. Region 10, Seattle, WA. EPA-910-D-01-001 May 2001. | ||||
Guideline Reference: | Washington State Department of Ecology (WDOE). 2002. Evaluating Standards for Protecting Aquatic Life in Washington’s Surface Water Quality Standards: Temperature Criteria. Draft Discussion Paper and Literature Summary. Publication Number 00-10-070. | ||||
Guideline Reference: | Beschta RL, Bilby RE, Brown GW, Holtby LB, Hofstra TD. 1987. Stream temperature and aquatic habitat: Fisheries and forestry interactions. In: Salo EO, Cundy TW, eds. Streamside management: forestry and fishery interactions. College of Forest Resources, University of Washington, Seattle. Contribution No. 57. Proceedings of a Symposium held at University of Washington, February 12-14, 1986, pp. 191-231. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-14 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 298750 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Fish Migration | ||||
Number of Samples: | 18 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. The temperature of any cold or warm freshwater habitat shall not be increased by more than 5 degrees F (2.8 degrees C) above natural receiving water temperature. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Scientific literature reviewed by the Washington Department of Ecology and U.S. EPA indicates that stream temperatures higher than 21C are associated with avoidance behavior and migration blockages in steelhead trout. | ||||
Guideline Reference: | EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. Region 10 Office of Water, Seattle, WA | ||||
Guideline Reference: | U.S. Environmental Protection Agency (USEPA). 2001. Issue Paper 1: Salmonid Behavior and Water Temperature Prepared as Part of EPA Region 10 Temperature Water Quality Criteria Guidance Development Project. Region 10, Seattle, WA. EPA-910-D-01-001 May 2001. | ||||
Guideline Reference: | Washington State Department of Ecology (WDOE). 2002. Evaluating Standards for Protecting Aquatic Life in Washington’s Surface Water Quality Standards: Temperature Criteria. Draft Discussion Paper and Literature Summary. Publication Number 00-10-070. | ||||
Guideline Reference: | Beschta RL, Bilby RE, Brown GW, Holtby LB, Hofstra TD. 1987. Stream temperature and aquatic habitat: Fisheries and forestry interactions. In: Salo EO, Cundy TW, eds. Streamside management: forestry and fishery interactions. College of Forest Resources, University of Washington, Seattle. Contribution No. 57. Proceedings of a Symposium held at University of Washington, February 12-14, 1986, pp. 191-231. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT010 (Nathanson Creek at Watmaugh just west of 5th Street). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-14 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 298973 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Fish Migration | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. The temperature of any cold or warm freshwater habitat shall not be increased by more than 5 degrees F (2.8 degrees C) above natural receiving water temperature. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Scientific literature reviewed by the Washington Department of Ecology and U.S. EPA indicates that stream temperatures higher than 21C are associated with avoidance behavior and migration blockages in steelhead trout. | ||||
Guideline Reference: | EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. Region 10 Office of Water, Seattle, WA | ||||
Guideline Reference: | U.S. Environmental Protection Agency (USEPA). 2001. Issue Paper 1: Salmonid Behavior and Water Temperature Prepared as Part of EPA Region 10 Temperature Water Quality Criteria Guidance Development Project. Region 10, Seattle, WA. EPA-910-D-01-001 May 2001. | ||||
Guideline Reference: | Washington State Department of Ecology (WDOE). 2002. Evaluating Standards for Protecting Aquatic Life in Washington’s Surface Water Quality Standards: Temperature Criteria. Draft Discussion Paper and Literature Summary. Publication Number 00-10-070. | ||||
Guideline Reference: | Beschta RL, Bilby RE, Brown GW, Holtby LB, Hofstra TD. 1987. Stream temperature and aquatic habitat: Fisheries and forestry interactions. In: Salo EO, Cundy TW, eds. Streamside management: forestry and fishery interactions. College of Forest Resources, University of Washington, Seattle. Contribution No. 57. Proceedings of a Symposium held at University of Washington, February 12-14, 1986, pp. 191-231. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 298814 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Fish Migration | ||||
Number of Samples: | 7 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. The temperature of any cold or warm freshwater habitat shall not be increased by more than 5 degrees F (2.8 degrees C) above natural receiving water temperature. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Scientific literature reviewed by the Washington Department of Ecology and U.S. EPA indicates that stream temperatures higher than 21C are associated with avoidance behavior and migration blockages in steelhead trout. | ||||
Guideline Reference: | EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. Region 10 Office of Water, Seattle, WA | ||||
Guideline Reference: | U.S. Environmental Protection Agency (USEPA). 2001. Issue Paper 1: Salmonid Behavior and Water Temperature Prepared as Part of EPA Region 10 Temperature Water Quality Criteria Guidance Development Project. Region 10, Seattle, WA. EPA-910-D-01-001 May 2001. | ||||
Guideline Reference: | Washington State Department of Ecology (WDOE). 2002. Evaluating Standards for Protecting Aquatic Life in Washington’s Surface Water Quality Standards: Temperature Criteria. Draft Discussion Paper and Literature Summary. Publication Number 00-10-070. | ||||
Guideline Reference: | Beschta RL, Bilby RE, Brown GW, Holtby LB, Hofstra TD. 1987. Stream temperature and aquatic habitat: Fisheries and forestry interactions. In: Salo EO, Cundy TW, eds. Streamside management: forestry and fishery interactions. College of Forest Resources, University of Washington, Seattle. Contribution No. 57. Proceedings of a Symposium held at University of Washington, February 12-14, 1986, pp. 191-231. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT040 (Nathanson Creek at north boundary of SVHS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-21 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289002 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: “- The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. - The temperature of any cold or warm freshwater habitat shall not be increased by more than 5°F (2.8°C) above natural receiving water temperature.” | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Per Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids (Carter 2008, Moyle 1976, and USEPA 1977), the lethal temperature evaluation guideline for both the steelhead adult migration and holding and the steelhead juvenile growth and rearing life stages is 24°C. | ||||
Guideline Reference: | Temperature criteria for freshwater fish: protocol and procedures. Ecological Research Series. EPA-600/3-77-061 (NTIS PB270032). Prepared by W.A. Brungs and B.R. Jones. U.S. Environmental Protection Agency, Washington, D.C | ||||
Guideline Reference: | Inland Fishes of California | ||||
Guideline Reference: | Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT040 (Nathanson Creek at north boundary of SVHS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-14 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289122 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 31 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 31 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: “- The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. - The temperature of any cold or warm freshwater habitat shall not be increased by more than 5°F (2.8°C) above natural receiving water temperature.” | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Per Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids (Carter 2008, Moyle 1976, and USEPA 1977), the lethal temperature evaluation guideline for both the steelhead adult migration and holding and the steelhead juvenile growth and rearing life stages is 24°C. | ||||
Guideline Reference: | Temperature criteria for freshwater fish: protocol and procedures. Ecological Research Series. EPA-600/3-77-061 (NTIS PB270032). Prepared by W.A. Brungs and B.R. Jones. U.S. Environmental Protection Agency, Washington, D.C | ||||
Guideline Reference: | Inland Fishes of California | ||||
Guideline Reference: | Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT010 (Nathanson Creek at Watmaugh just west of 5th Street). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-07 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289160 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: “- The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. - The temperature of any cold or warm freshwater habitat shall not be increased by more than 5°F (2.8°C) above natural receiving water temperature.” | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Per Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids (Carter 2008, Moyle 1976, and USEPA 1977), the lethal temperature evaluation guideline for both the steelhead adult migration and holding and the steelhead juvenile growth and rearing life stages is 24°C. | ||||
Guideline Reference: | Temperature criteria for freshwater fish: protocol and procedures. Ecological Research Series. EPA-600/3-77-061 (NTIS PB270032). Prepared by W.A. Brungs and B.R. Jones. U.S. Environmental Protection Agency, Washington, D.C | ||||
Guideline Reference: | Inland Fishes of California | ||||
Guideline Reference: | Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT035 (Nathanson Creek at south boundary of AHMS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-14 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289006 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: “- The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. - The temperature of any cold or warm freshwater habitat shall not be increased by more than 5°F (2.8°C) above natural receiving water temperature.” | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Per Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids (Carter 2008, Moyle 1976, and USEPA 1977), the lethal temperature evaluation guideline for both the steelhead adult migration and holding and the steelhead juvenile growth and rearing life stages is 24°C. | ||||
Guideline Reference: | Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region | ||||
Guideline Reference: | Temperature criteria for freshwater fish: protocol and procedures. Ecological Research Series. EPA-600/3-77-061 (NTIS PB270032). Prepared by W.A. Brungs and B.R. Jones. U.S. Environmental Protection Agency, Washington, D.C | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289054 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 31 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 31 samples exceeded the water quality threshold for Temperature. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Temperature objectives for surface waters are specified in the San Francisco Bay Regional Water Quality Control Plan. The following temperature objectives apply to surface waters: “- The natural receiving water temperature of inland surface waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. - The temperature of any cold or warm freshwater habitat shall not be increased by more than 5°F (2.8°C) above natural receiving water temperature.” | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Per Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids (Carter 2008, Moyle 1976, and USEPA 1977), the lethal temperature evaluation guideline for both the steelhead adult migration and holding and the steelhead juvenile growth and rearing life stages is 24°C. | ||||
Guideline Reference: | Temperature criteria for freshwater fish: protocol and procedures. Ecological Research Series. EPA-600/3-77-061 (NTIS PB270032). Prepared by W.A. Brungs and B.R. Jones. U.S. Environmental Protection Agency, Washington, D.C | ||||
Guideline Reference: | Inland Fishes of California | ||||
Guideline Reference: | Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-07 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144618 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Tetramethrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 289164 | ||||
Pollutant: | Tetramethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Tetramethrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for tetramethrin is the USEPA Aquatic Life Benchmark of 1.85 ug/L for a fish (acute). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289162 | ||||
Pollutant: | Tetramethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Tetramethrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for tetramethrin is the USEPA Aquatic Life Benchmark of 1.85 ug/L for a fish (acute). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289180 | ||||
Pollutant: | Tetramethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Tetramethrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for tetramethrin is the USEPA Aquatic Life Benchmark of 1.85 ug/L for a fish (acute). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289163 | ||||
Pollutant: | Tetramethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Tetramethrin. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The evaluation guideline for tetramethrin is the USEPA Aquatic Life Benchmark of 1.85 ug/L for a fish (acute). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144622 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Turbidity |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded. |
|
|||||
LOE ID: | 302881 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 3 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Turbidity. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009). The application of this evaluation guideline was restricted to the dry season (May to October) because runoff and resuspension of fine substrate during storm events may naturally elevate turbidity compared to baseflow conditions. The magnitude and duration of these increases will vary depending on the watershed’s geology and land use and may not represent a chronic turbidity problem. Turbidity is naturally higher in tidal river systems, so sample locations with salinity regimes (i.e., Freshwater or Marine) designated as “Marine” were excluded from this analysis. | ||||
Guideline Reference: | The Effects of Turbidity on Prey Selection by Piscivorous Largemouth Bass | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2019-06-24 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289558 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 3 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Turbidity. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Sigler et al. (1984) states that turbidities of 25 NTUs or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food. The application of this evaluation guideline was restricted to the dry season (May to October) because Coho and steelhead early life stages are present during the dry season and feeding becomes infrequent during the winter months (Moyle 2002). Additionally, runoff and resuspension of fine substrate during storm events may naturally elevate turbidity compared to baseflow conditions. The magnitude and duration of these increases will vary depending on the watershed’s geology and land use and may not represent a chronic turbidity problem. Turbidity is naturally higher in tidal river systems, so sample locations with salinity regimes (i.e., Freshwater or Marine) designated as “Marine” were excluded from this analysis. | ||||
Guideline Reference: | Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150 | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT010 (Nathanson Creek at Watmaugh just west of 5th Street). | ||||
Temporal Representation: | The samples were collected between the dates of 2019-06-24 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 289639 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 3 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Turbidity. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Sigler et al. (1984) states that turbidities of 25 NTUs or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food. The application of this evaluation guideline was restricted to the dry season (May to October) because Coho and steelhead early life stages are present during the dry season and feeding becomes infrequent during the winter months (Moyle 2002). Additionally, runoff and resuspension of fine substrate during storm events may naturally elevate turbidity compared to baseflow conditions. The magnitude and duration of these increases will vary depending on the watershed’s geology and land use and may not represent a chronic turbidity problem. Turbidity is naturally higher in tidal river systems, so sample locations with salinity regimes (i.e., Freshwater or Marine) designated as “Marine” were excluded from this analysis. | ||||
Guideline Reference: | Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150 | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2019-06-24 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 302852 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 3 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Turbidity. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009). The application of this evaluation guideline was restricted to the dry season (May to October) because runoff and resuspension of fine substrate during storm events may naturally elevate turbidity compared to baseflow conditions. The magnitude and duration of these increases will vary depending on the watershed’s geology and land use and may not represent a chronic turbidity problem. Turbidity is naturally higher in tidal river systems, so sample locations with salinity regimes (i.e., Freshwater or Marine) designated as “Marine” were excluded from this analysis. | ||||
Guideline Reference: | The Effects of Turbidity on Prey Selection by Piscivorous Largemouth Bass | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT010 (Nathanson Creek at Watmaugh just west of 5th Street). | ||||
Temporal Representation: | The samples were collected between the dates of 2019-06-24 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144620 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | pH |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. One line of evidence are available in the administrative record to assess this pollutant. Zero of fifty-three samples exceed the Basin Plan objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of fifty-three samples exceed the Basin Plan objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 287755 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 19 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 19 samples exceeded the water quality threshold for pH. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.9 pH states: The pH shall not be depressed below 6.5 nor raised above 8.5. This encompasses the pH range usually found in waters within the basin. Controllable water quality factors shall not cause changes greater than 0.5 units in normal ambient pH levels. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-14 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 287506 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 18 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality threshold for pH. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.9 pH states: The pH shall not be depressed below 6.5 nor raised above 8.5. This encompasses the pH range usually found in waters within the basin. Controllable water quality factors shall not cause changes greater than 0.5 units in normal ambient pH levels. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT010 (Nathanson Creek at Watmaugh just west of 5th Street). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-14 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 287436 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 7 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for pH. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.9 pH states: The pH shall not be depressed below 6.5 nor raised above 8.5. This encompasses the pH range usually found in waters within the basin. Controllable water quality factors shall not cause changes greater than 0.5 units in normal ambient pH levels. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT035 (Nathanson Creek at south boundary of AHMS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-21 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 287717 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 7 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for pH. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.9 pH states: The pH shall not be depressed below 6.5 nor raised above 8.5. This encompasses the pH range usually found in waters within the basin. Controllable water quality factors shall not cause changes greater than 0.5 units in normal ambient pH levels. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT040 (Nathanson Creek at north boundary of SVHS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-21 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 287699 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for pH. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.9 pH states: The pH shall not be depressed below 6.5 nor raised above 8.5. This encompasses the pH range usually found in waters within the basin. Controllable water quality factors shall not cause changes greater than 0.5 units in normal ambient pH levels. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144619 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Oxygen, Dissolved |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Sources: | A Source Unknown |
TMDL Priority: | Low |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. Forty-three of the eighty-six samples exceed the Basin Plan COLD dissolved oxygen objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Forty-three of the eighty-six samples exceed the Basin Plan COLD dissolved oxygen objective and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 286314 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 7 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 7 of 11 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT035 (Nathanson Creek at south boundary of AHMS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-14 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286195 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 31 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 31 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT010 (Nathanson Creek at Watmaugh just west of 5th Street). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-07 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 285949 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as cold water habitat shall be of a 7.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286475 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 9 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 9 of 11 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as cold water habitat shall be of a 7.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT035 (Nathanson Creek at south boundary of AHMS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-14 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286242 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 31 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 4 of 31 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-07 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286312 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286243 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 5 of 11 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as warm water habitat shall be of a 5.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT040 (Nathanson Creek at north boundary of SVHS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-14 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 285879 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 31 | ||||
Number of Exceedances: | 14 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 14 of 31 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as cold water habitat shall be of a 7.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT010 (Nathanson Creek at Watmaugh just west of 5th Street). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-07 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286497 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 31 | ||||
Number of Exceedances: | 12 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 12 of 31 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as cold water habitat shall be of a 7.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-02-07 and 2019-07-15 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 286498 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 8 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 8 of 11 samples exceeded the water quality threshold for Oxygen, Dissolved. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Dissolved oxygen objectives for waters designated as cold water habitat shall be of a 7.0 mg/l minimum. (Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives.) | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT040 (Nathanson Creek at north boundary of SVHS). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-06-14 and 2018-06-05 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144624 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Fipronil |
Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Sources: | Other Urban Runoff | Surface Runoff |
TMDL Name: | San Francisco Bay Urban Creeks Diazinon |
TMDL Project Code: | 9 |
Date TMDL Approved by USEPA: | 05/21/2007 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. NUMBER lines of evidence are available in the administrative record to assess this pollutant. NUMBER of the NUMBER samples exceed the OBJECTIVE/GUIDELINE/CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. NUMBER of NUMBER samples exceed the OBJECTIVE/GUIDELINE/CRITERIA and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 283873 | ||||
Pollutant: | Fipronil | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Fipronil. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of fipronil does not exceed 0.0032 ug/L (3.2 ng/L) in the water column more than once every three years on average (Bower, et al. 2017). | ||||
Guideline Reference: | Water and Sediment Quality Criteria Report for Fipronil. Phase III: Application of the pesticide water and sediment quality criteria methodologies. Department of Environmental Toxicology, University of California, Davis. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283939 | ||||
Pollutant: | Fipronil | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Fipronil. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of fipronil does not exceed 0.0032 ug/L (3.2 ng/L) in the water column more than once every three years on average (Bower, et al. 2017). | ||||
Guideline Reference: | Water and Sediment Quality Criteria Report for Fipronil. Phase III: Application of the pesticide water and sediment quality criteria methodologies. Department of Environmental Toxicology, University of California, Davis. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283936 | ||||
Pollutant: | Fipronil | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Fipronil. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of fipronil does not exceed 0.0032 ug/L (3.2 ng/L) in the water column more than once every three years on average (Bower, et al. 2017). | ||||
Guideline Reference: | Water and Sediment Quality Criteria Report for Fipronil. Phase III: Application of the pesticide water and sediment quality criteria methodologies. Department of Environmental Toxicology, University of California, Davis. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 283834 | ||||
Pollutant: | Fipronil | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Fipronil. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of fipronil does not exceed 0.0032 ug/L (3.2 ng/L) in the water column more than once every three years on average (Bower, et al. 2017). | ||||
Guideline Reference: | Water and Sediment Quality Criteria Report for Fipronil. Phase III: Application of the pesticide water and sediment quality criteria methodologies. Department of Environmental Toxicology, University of California, Davis. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
149126 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
||
Pollutant: | Indicator Bacteria |
Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Sources: | A Source Unknown |
TMDL Name: | Sonoma Creek Pathogens |
TMDL Project Code: | 63 |
Date TMDL Approved by USEPA: | 02/29/2008 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under sections 2.2 and 3.3 of the Listing Policy. Under section 3.3 of the Policy, a minimum of one line of evidence is needed to assess listing status. Eight lines of evidence are available in the administrative record to assess this pollutant. Thirteen out of seventeen samples exceeded the geometric mean bacteria objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Thirteen out of seventeen samples exceeded the geometric mean bacteria objective and these exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. The Sonoma Creek Pathogen TMDL was approved by USEPA in February 29, 2008. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 300192 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | GeoMean | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and the results are as follows: 2 of the 2 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): 206NAT040 (Nathanson Creek at north boundary of SVHS). | ||||
Temporal Representation: | The samples were collected between the days of 2017-06-14 and 2018-06-05 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 300214 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | GeoMean | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and the results are as follows: 1 of the 2 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): 206NAT035 (Nathanson Creek at south boundary of AHMS). | ||||
Temporal Representation: | The samples were collected between the days of 2017-06-14 and 2018-06-05 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 300061 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | STV | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and the results are as follows: 1 of the 5 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): 206NAT035 (Nathanson Creek at south boundary of AHMS). | ||||
Temporal Representation: | The samples were collected between the days of 2017-06-14 and 2018-06-05 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 299938 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | GeoMean | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 6 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and the results are as follows: 4 of the 6 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the days of 2017-02-07 and 2019-07-15 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 300086 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | GeoMean | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 7 | ||||
Number of Exceedances: | 6 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and the results are as follows: 6 of the 7 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): 206NAT010 (Nathanson Creek at Watmaugh just west of 5th Street). | ||||
Temporal Representation: | The samples were collected between the days of 2017-02-07 and 2019-07-15 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 299912 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | STV | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 12 | ||||
Number of Exceedances: | 8 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and the results are as follows: 8 of the 12 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): 206NAT010 (Nathanson Creek at Watmaugh just west of 5th Street). | ||||
Temporal Representation: | The samples were collected between the days of 2017-02-07 and 2019-07-15 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 300217 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | STV | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and the results are as follows: 4 of the 11 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the days of 2017-02-07 and 2019-07-15 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
|
|||||
LOE ID: | 300151 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | STV | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and the results are as follows: 3 of the 5 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018). | ||||
Objective/Criterion Reference: | Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): 206NAT040 (Nathanson Creek at north boundary of SVHS). | ||||
Temporal Representation: | The samples were collected between the days of 2017-06-14 and 2018-06-05 . | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
DECISION ID |
144623 |
Region 2 |
Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) |
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Pollutant: | Pyrethroids |
Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Sources: | Other Urban Runoff | Surface Runoff |
TMDL Name: | San Francisco Bay Urban Creeks Diazinon |
TMDL Project Code: | 9 |
Date TMDL Approved by USEPA: | 05/21/2007 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. Two of the two total pyrethroid water samples exceed the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Two of two samples exceed the evaluation guideline and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 287648 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Pyrethroids. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 287668 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 287724 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 287705 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206FRY001 (Fryer Creek at Leveroni Road). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 287707 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 2 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2017-11-16 to 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||
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LOE ID: | 287685 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 2 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Clean Streams in S. SoCo Pathogen Source Detection data for Nathanson Creek subwatershed (Sonoma County, tributary to Sonoma Creek) to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Pyrethroids. | ||||
Data Reference: | Field, Habitat, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan for the San Francisco Bay Basin: Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2) | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 206NAT030 (Nathanson Creek at Nathanson Park). | ||||
Temporal Representation: | The samples were collected between the dates of 2017-11-16 and 2018-11-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | Sonoma County Permit and Resource Management Department. 2019. Clean Streams in Southern Sonoma County (CS3C). | ||||
QAPP Information Reference(s): | Clean Streams in Southern Sonoma County (CS3C) | ||||