Final California 2026 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 8 - Santa Ana Region

Water Body Name: Bolsa Chica State Beach
Water Body ID: CAX8011100019991012170142
Water Body Type: Coastal & Bay Shoreline
 
DECISION ID
149134
Region 8     
Bolsa Chica State Beach
 
Pollutant: Indicator Bacteria
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2018)
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 and 3.3 of the Listing Policy. Under these sections a single line of evidence is necessary to assess listing status.

The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective. The Ocean Plan bacteria water quality objective for the SHEL beneficial use is expressed in total coliform. This waterbody is being considered for placement on or removal from the CWA section 303(d) List under section 3.3 or 4.3 of the Listing Policy, as applicable, using the fecal coliform, enterococci and total coliform objectives.

Ten (10) lines of evidence area available in the administrative record to assess this pollutant for the REC-1 beneficial use. Twelve (12) of 956 samples exceed the 6-week Enterococcus Geomean Objective. Zero (0) of 490 samples exceed the monthly Fecal Coliform Geomean Objective. Sixteen (16) of 1132 samples exceed the Fecal Coliform Single Sample Maximum Objective.

Six (6) lines of evidence are available in the administrative record to assess this pollutant for the SHEL beneficial use. Three-hundred nine (309) of 1225 samples exceed the 90th percentile objective for Total Coliform and ninety-six (96) of 1225 samples exceed the median objective for Total Coliform for the SHEL beneficial use.

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 for impairment of the REC-1 beneficial use. However, there is sufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of the SHEL beneficial use.

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. Twelve (12) of 956 samples exceed the Enterococcus Geomean Objective for the REC-1 beneficial use, Zero (0) of 490 samples exceed the Fecal Coliform Geomean Objective for the REC-1 beneficial use, Sixteen (16) of 1132 samples exceed the Fecal Coliform Single Sample Maximum Objective for the REC-1 beneficial use, and ninety-six (96) of 1225 samples exceed the Total Coliform Median Objective for the SHEL beneficial use and this does not exceed the frequency listed in table 3.2 of the Listing Policy.
4. Three-hundred nine (309) of 1225 samples exceed the Total Coliform 90th percentile Objective for the SHEL beneficial use and this does exceed the frequency listed in table 3.2 of the Listing Policy.
5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

While there is justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of the SHEL beneficial use, the Santa Ana Water Board considers this waterbody-pollutant combination lowest priority for TMDL development as the water quality objective for the SHEL beneficial use has been determined by the State Water Board to require updating. On December 3, 2019, the State Water Board adopted the 2019 Triennial Review of the Ocean Plan and identified as a high priority a project to consider amending the Ocean Plan to review and revise the existing shellfish harvesting total coliform objective. The State Water Board recognized that the current total coliform water quality objective may be unattainable, as exceedances of the standard were found to be common in reference-quality areas. Following the update of the water quality objective, this waterbody will be reassessed and reprioritized for TMDL development, if needed.

In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate subst
 
DECISION ID
149134
Region 8     
Bolsa Chica State Beach
 
Pollutant: Indicator Bacteria
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2018)
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 and 3.3 of the Listing Policy. Under these sections a single line of evidence is necessary to assess listing status.

The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective. The Ocean Plan bacteria water quality objective for the SHEL beneficial use is expressed in total coliform. This waterbody is being considered for placement on or removal from the CWA section 303(d) List under section 3.3 or 4.3 of the Listing Policy, as applicable, using the fecal coliform, enterococci and total coliform objectives.

Ten (10) lines of evidence area available in the administrative record to assess this pollutant for the REC-1 beneficial use. Twelve (12) of 956 samples exceed the 6-week Enterococcus Geomean Objective. Zero (0) of 490 samples exceed the monthly Fecal Coliform Geomean Objective. Sixteen (16) of 1132 samples exceed the Fecal Coliform Single Sample Maximum Objective.

Six (6) lines of evidence are available in the administrative record to assess this pollutant for the SHEL beneficial use. Three-hundred nine (309) of 1225 samples exceed the 90th percentile objective for Total Coliform and ninety-six (96) of 1225 samples exceed the median objective for Total Coliform for the SHEL beneficial use.

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 for impairment of the REC-1 beneficial use. However, there is sufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of the SHEL beneficial use.

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. Twelve (12) of 956 samples exceed the Enterococcus Geomean Objective for the REC-1 beneficial use, Zero (0) of 490 samples exceed the Fecal Coliform Geomean Objective for the REC-1 beneficial use, Sixteen (16) of 1132 samples exceed the Fecal Coliform Single Sample Maximum Objective for the REC-1 beneficial use, and ninety-six (96) of 1225 samples exceed the Total Coliform Median Objective for the SHEL beneficial use and this does not exceed the frequency listed in table 3.2 of the Listing Policy.
4. Three-hundred nine (309) of 1225 samples exceed the Total Coliform 90th percentile Objective for the SHEL beneficial use and this does exceed the frequency listed in table 3.2 of the Listing Policy.
5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

While there is justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of the SHEL beneficial use, the Santa Ana Water Board considers this waterbody-pollutant combination lowest priority for TMDL development as the water quality objective for the SHEL beneficial use has been determined by the State Water Board to require updating. On December 3, 2019, the State Water Board adopted the 2019 Triennial Review of the Ocean Plan and identified as a high priority a project to consider amending the Ocean Plan to review and revise the existing shellfish harvesting total coliform objective. The State Water Board recognized that the current total coliform water quality objective may be unattainable, as exceedances of the standard were found to be common in reference-quality areas. Following the update of the water quality objective, this waterbody will be reassessed and reprioritized for TMDL development, if needed.

In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy.

Historic lines of evidence are: 5 LOEs for Enterococcus (81307, 81306, 5920, 81305, and 5680), 4 LOEs for Fecal Coliform (81309, 81310, 5681, 81308), and 5 LOEs for Total Coliform (81320, 81319, 5922, 5669, 81311) and will be retired.

For enterococci data, Listing Policy sections 3.3antially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy.

Historic lines of evidence are: 5 LOEs for Enterococcus (81307, 81306, 5920, 81305, and 5680), 4 LOEs for Fecal Coliform (81309, 81310, 5681, 81308), and 5 LOEs for Total Coliform (81320, 81319, 5922, 5669, 81311) and will be retired.

For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches from April 1 through October 31 only.
 
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: In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy.

Historic lines of evidence are: 5 LOEs for Enterococcus (81307, 81306, 5920, 81305, and 5680), 4 LOEs for Fecal Coliform (81309, 81310, 5681, 81308), and 5 LOEs for Total Coliform (81320, 81319, 5922, 5669, 81311) and will be retired.

For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches from April 1 through October 31 only.
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
Listing Extent: While this decision was based on a sufficient number of exceedances of the Total Coliform 90th percentile Objective for the SHEL beneficial use, it should be noted that the Santa Ana Water Board considers this waterbody-pollutant combination lowest priority for TMDL development as the water quality objective for the SHEL beneficial use has been determined by the State Water Board to require updating.
 
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300877
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
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: In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy.

Historic lines of evidence are: 5 LOEs for Enterococcus (81307, 81306, 5920, 81305, and 5680), 4 LOEs for Fecal Coliform (81309, 81310, 5681, 81308), and 5 LOEs for Total Coliform (81320, 81319, 5922, 5669, 81311) and will be retired.

For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches from April 1 through October 31 only.
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
Listing Extent: While this decision was based on a sufficient number of exceedances of the Total Coliform 90th percentile Objective for the SHEL beneficial use, it should be noted that the Santa Ana Water Board considers this waterbody-pollutant combination lowest priority for TMDL development as the water quality objective for the SHEL beneficial use has been determined by the State Water Board to require updating.
 
 
" valign="top" width="33%">QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300877
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The sp" width="33%">SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): CBCW1 (CBCW1-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2013-11-05 and 2013-11-25 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300736
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 627
Number of Exceedances: 46
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 46 of the 627 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-03 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Temporal Representation:
 The samples were collected between the days of 2013-11-05 and 2013-11-25 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300736
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 627
Number of Exceedances: 46
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 46 of the 627 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-03 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300852
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: Region 8     
Bolsa Chica State Beach
 
LOE ID: 300852
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): CBCW1 (CBCW1-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2013-11-12 and 2013-11-12 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300755
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 0.1
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 597
Number of Exceedances: 137
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 137 of the 597 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the shell>1
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): CBCW1 (CBCW1-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2013-11-12 and 2013-11-12 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300755
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 0.1
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 597
Number of Exceedances: 137
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 137 of the 597 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the shellfish beneficial use in ocean waters applies a threshold of 230 per 100 mL for total coliform, not to be exceeded by more than 10 percent of samples. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-02 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300844
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 597
Number of Exceedances: 50
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 50 of the 597 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-02 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300751
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 0.1
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-02 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300844
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 597
Number of Exceedances: 50
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 50 of the 597 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-02 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the shellfish beneficial use in ocean waters applies a threshold of 230 per 100 mL for total coliform, not to be exceeded by more than 10 percent of samples. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): CBCW1 (CBCW1-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2013-11-12 and 2013-11-12 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300878
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 122
Number of Exceedances: 12
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 12 of the 122 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-01 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
 
LOE ID: 300751
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 0.1
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the shellfish beneficial use in ocean waters applies a threshold of 230 per 100 mL for total coliform, not to be exceeded by more than 10 percent of samples. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): CBCW1 (CBCW1-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2013-11-12 and 2013-11-12 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300878
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 122
Number of Exceedances: 12
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 12 of the 122 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-01 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300764
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 0.1
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 627
Number of Exceedances: 172
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 172 of the 627 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the shellfish beneficial use in ocean waters applies a threshold of 230 per 100 mL for total coliform, not to be exceeded by more than 10 percent of samples. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-03 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300742
 
Pollutant: Enterococcus QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300764
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 0.1
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 627
Number of Exceedances: 172
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 172 of the 627 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the shellfish beneficial use in ocean waters applies a threshold of 230 per 100 mL for total coliform, not to be exceeded by more than 10 percent of samples. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-03 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300742
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 491
Number of Exceedances: 12
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 12 of the 491 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-08-31 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300833
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 123
Number of Exceedances: 18
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 18 of the 123 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-08-31 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 491
Number of Exceedances: 12
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 12 of the 491 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-08-31 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300833
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 123
Number of Exceedances: 18
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 18 of the 123 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-08-31 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300848
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 465
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 465 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-01 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300715
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300848
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 465
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 465 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-01 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300715
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 257
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 257 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-03 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300802
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: SSM
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 551
Number of Exceedances: 4
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 4 of the 551 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-06 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Beneficial Use:
 Water Contact Recreation
 
Number of Samples: 257
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 257 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-03 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300802
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: SSM
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 551
Number of Exceedances: 4
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 4 of the 551 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300830
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: SSM
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 580
Number of Exceedances: 12
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 12 of the 580 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-03 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300803
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: SSM
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): CBCW1 (CBCW1-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2013-11-25 and 2013-11-25 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300722
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 233
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 233 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-06 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
"top" width="33%">Temporal Representation:		 The samples were collected between the days of 2010-09-06 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300830
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: SSM
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 580
Number of Exceedances: 12
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 12 of the 580 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 33N (33N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-03 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300803
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: SSM
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): CBCW1 (CBCW1-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2013-11-25 and 2013-11-25 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 149134, Indicator Bacteria
Region 8     
Bolsa Chica State Beach
 
LOE ID: 300722
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 233
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch_Orange County data for Bolsa Chica State Beach to determine beneficial use support and the results are as follows: 0 of the 233 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019)
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): 39N (39N-Bolsa Chica State Beach, Orange).
Temporal Representation: The samples were collected between the days of 2010-09-06 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
 
DECISION ID
75648
Region 8     
Bolsa Chica State Beach
 
Pollutant: Copper
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Sources: A Source Unknown
TMDL Priority: Low
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle.

303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.
 
Regional Board Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.
 
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.
 
Listing Extent: This listing was made by USEPA.
 
 
Line of Evidence (LOE) for Decision ID 75648, Copper
Region 8     
Bolsa Chica State Beach
 
LOE ID: 4401
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Marine Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Unspecified
Objective/Criterion Reference: Placeholder reference pre-2006 303(d)
 
Evaluation Guideline: Unspecified
Guideline Reference: Placeholder reference pre-2006 303(d)
 
Spatial Representation: Unspecified
Temporal Representation: Unspecified
Environmental Conditions: Unspecified
QAPP Information: Unspecified
QAPP Information Reference(s):
 
 
DECISION ID
68956
Region 8     
Bolsa Chica State Beach
 
Pollutant: Nickel
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Sources: A Source Unknown
TMDL Priority: Low
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle.

303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.
 
Regional Board Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.
 
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.
 
Listing Extent: This listing was made by USEPA.
 
 
Line of Evidence (LOE) for Decision ID 68956, Nickel
Region 8     
Bolsa Chica State Beach
 
LOE ID: 4402
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Marine Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Unspecified
Objective/Criterion Reference: Placeholder reference pre-2006 303(d)
 
Evaluation Guideline: Unspecified
Guideline Reference: Placeholder reference pre-2006 303(d)
 
Spatial Representation: Unspecified
Temporal Representation: Unspecified
Environmental Conditions: Unspecified
QAPP Information: Unspecified
QAPP Information Reference(s):
 
 
DECISION ID
75648
Region 8     
Bolsa Chica State Beach
 
Pollutant: Copper
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Sources: A Source Unknown
TMDL Priority: Low
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle.

303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.
 
Regional Board Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.
 
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.
 
Listing Extent: This listing was made by USEPA.
 
 
Line of Evidence (LOE) for Decision ID 75648, Copper
Region 8     
Bolsa Chica State Beach
 
LOE ID: 4401
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Marine Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Unspecified
Objective/Criterion Reference: Placeholder reference pre-2006 303(d)
 
Evaluation Guideline: Unspecified
Guideline Reference: Placeholder reference pre-2006 303(d)
 
Spatial Representation: Unspecified
Temporal Representation: Unspecified
Environmental Conditions: Unspecified
QAPP Information: Unspecified
QAPP Information Reference(s):
 
 
DECISION ID
68956
Region 8     
Bolsa Chica State Beach
 
Pollutant: Nickel
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Sources: A Source Unknown
TMDL Priority: Low
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle.

303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.
 
Regional Board Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.
 
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.
 
Listing Extent: This listing was made by USEPA.
 
 
Line of Evidence (LOE) for Decision ID 68956, Nickel
Region 8     
Bolsa Chica State Beach
 
LOE ID: 4402
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Marine Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Unspecified
Objective/Criterion Reference: Placeholder reference pre-2006 303(d)
 
Evaluation Guideline: Unspecified
Guideline Reference: Placeholder reference pre-2006 303(d)
 
Spatial Representation: Unspecified
Temporal Representation: Unspecified
Environmental Conditions: Unspecified
QAPP Information: Unspecified
QAPP Information Reference(s):