Draft California 2020 Integrated Report (303(d) List/305(b) Report)

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218108

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 48 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.

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): Main

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218151

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 56 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.

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): Main-C

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150024

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

120

Number of Exceedances:

107

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 107 of the 120 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.

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): Main-C

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218036

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 33 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.

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): Main

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218139

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 61 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.

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): Wharf-East

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218027

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 44 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.

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): Main-C

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

149984

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

121

Number of Exceedances:

111

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 111 of the 121 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.

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): Main-A

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150020

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 19 of the 19 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.

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): Main-D

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2017-05-15 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218030

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 45 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.

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): Wharf-East

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150016

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 19 of the 19 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.

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): Main-D

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2017-05-15 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218029

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 0 of the 2 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.

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): Main-A

Temporal Representation:

The samples were collected between the days of 2018-03-12 and 2018-04-02 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218025

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 51 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.

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): Main-B

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150030

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

120

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 95 of the 120 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.

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): Main-C

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150006

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

121

Number of Exceedances:

113

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 113 of the 121 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.

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): Main-B

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218133

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.

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): Main-B

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

149985

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

121

Number of Exceedances:

115

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 115 of the 121 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.

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): Main-A

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129379, Total Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150062

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

121

Number of Exceedances:

105

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 105 of the 121 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.

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): Main-B

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.


DECISION ID	129378	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

Pollutant:	Fecal Coliform
Final Listing Decision:	Do Not 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
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. Twenty lines of evidence are available in the administrative record to assess this pollutant. One of the 118 GM samples exceed the REC-1 fecal coliform water quality 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. One of the 118 GM samples exceed the REC-1 fecal coliform water quality 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. 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. This waterbody is being considered for placement on the CWA section 303(d) List under section 3.3 of the Listing Policy, as applicable, using the fecal coliform objective. 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. For fecal coliform 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 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:	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. This waterbody is being considered for placement on the CWA section 303(d) List under section 3.3 of the Listing Policy, as applicable, using the fecal coliform objective. 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. For fecal coliform 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 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 applicable water quality standards for the pollutant are not exceeded.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218033

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 0 of the 15 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.

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): Main

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150025

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 0 of the 19 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.

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): Main-A

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218168

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 1 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): Main

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218059

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 8 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): Main-B

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150027

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

121

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 8 of the 121 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): Main-C

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218163

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 4 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): Main-C

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150061

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 2 of the 19 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): Main-D

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2017-05-15 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218055

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.

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): Main-B

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218118

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 9 of the 62 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): Wharf-East

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218037

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 1 of the 16 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.

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): Wharf-East

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

19562

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Central Coast Regional Board Staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and results are as follows: 0 of 21 samples exceed the criterion for Coliform, Fecal.

Data Reference:

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2005) states that the 30-day geometric mean for fecal coliform shall not exceed 200 MPN/100 mL.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Pacific Ocean at Main Beach was collected at one AB411 monitoring site (Main Beach @ Boardwalk)

Temporal Representation:

Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.

Environmental Conditions:

QAPP Information:

QA information not available

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

19563

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Central Coast Regional Board Staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and results are as follows: 1 of 89 samples exceed the criterion for Coliform, Fecal.

Data Reference:

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2005) states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Pacific Ocean at Main Beach was collected at one AB411 monitoring site (Main Beach @ Boardwalk)

Temporal Representation:

Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.

Environmental Conditions:

QAPP Information:

QA information not available

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218142

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 1 of the 9 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:

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): O460

Temporal Representation:

The samples were collected between the days of 2018-03-26 and 2018-08-06 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

149976

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.

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): Main-C

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218159

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 0 of the 2 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): Main-A

Temporal Representation:

The samples were collected between the days of 2018-03-12 and 2018-04-02 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218039

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.

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): Main-C

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218143

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 0 of the 8 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): O450

Temporal Representation:

The samples were collected between the days of 2018-03-26 and 2018-07-30 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150038

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

121

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 13 of the 121 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): Main-B

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150028

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.

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): Main-B

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129378, Fecal Coliform	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150036

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

121

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 14 of the 121 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.

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): Main-A

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.


DECISION ID	129377	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

Pollutant:	Enterococcus
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
Expected TMDL Completion Date:	2033
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. Twenty-five lines of evidence are available in the administrative record to assess this pollutant. Five hundred and seventy of the 1395 GM samples exceed the REC-1 enterococci water quality 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. Five hundred and seventy of the 1395 GM samples exceed the REC-1 enterococci water quality 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. 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. This waterbody is being considered for placement on the CWA section 303(d) List under section 3.3 of the Listing Policy, as applicable, using the enterococci objective. 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. 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:	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. This waterbody is being considered for placement on the CWA section 303(d) List under section 3.3 of the Listing Policy, as applicable, using the enterococci objective. 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. 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 the available data and information, SWRCB 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.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218103

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 27 of the 53 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.

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): Main

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218107

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 39 of the 53 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-B

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218115

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

106

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 28 of the 106 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.

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): O460

Temporal Representation:

The samples were collected between the days of 2010-09-09 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218146

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 12 of the 16 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-C

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

19564

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Central Coast Regional Board Staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and results are as follows: 1 of 26 samples exceed the criterion for Enterococci.

Data Reference:

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2005) states that the geometric mean for Enterococcus shall not exceed 35 MPN/100 mL.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Pacific Ocean at Main Beach was collected at one AB411 monitoring site (Main Beach @ Boardwalk)

Temporal Representation:

Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.

Environmental Conditions:

QAPP Information:

QA information not available

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

56352

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

162

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Eight of the 162 geomeans exceeded the entercoccus objective.

Data Reference:

Data for Region 3 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The geometric mean standard for enterococcus states that the entercoccus density shall not exceed 35 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from station 856 Main Beach at Boardwalk.

Temporal Representation:

Samples were collected approximately once a week from 2007 to 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

19565

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

112

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Central Coast Regional Board Staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and results are as follows: 3 of 112 samples exceed the criterion for Enterococci.

Data Reference:

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2005) states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Pacific Ocean at Main Beach was collected at one AB411 monitoring site (Main Beach @ Boardwalk)

Temporal Representation:

Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.

Environmental Conditions:

QAPP Information:

QA information not available

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

56351

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

181

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Beach Watch Program data that is collected by each County's Environmental Health Department for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and results are as follows: 4 of 181 samples exceed the criterion for Enterococci.

Data Reference:

Data for Region 3 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2005) single sample maximum for enterococcus density shall not exceed 104 per 100 mL.

Objective/Criterion Reference:

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk was collected at 1 monitoring site [ Main Beach @ Boardwalk]

Temporal Representation:

Data was collected over the time period 1/3/2007-8/23/2010.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

Water Board staff assessed Beach Watch Program data that is collected by each County's Environmental Health Department. There is no QA Project Plan but instead each County follows their own Quality Assurance Procedures

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218105

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 37 of the 53 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-C

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

149981

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 13 of the 15 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-D

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2017-05-15 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

149987

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

105

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 80 of the 105 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-B

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

149979

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 19 of the 30 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-B

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150021

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

105

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 67 of the 105 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-C

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218141

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 8 of the 16 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

149982

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk 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 Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-D

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2017-05-15 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218165

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 9 of the 16 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-B

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218162

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 0 of the 2 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-A

Temporal Representation:

The samples were collected between the days of 2018-03-12 and 2018-04-02 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218156

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

428

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 85 of the 428 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): O460

Temporal Representation:

The samples were collected between the days of 2010-09-09 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218047

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

425

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 83 of the 425 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): O450

Temporal Representation:

The samples were collected between the days of 2010-09-09 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150018

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 20 of the 30 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-A

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218127

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Wharf-East

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150029

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-C

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218129

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

106

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 34 of the 106 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): O450

Temporal Representation:

The samples were collected between the days of 2010-09-09 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

218052

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 44 of the 53 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Wharf-East

Temporal Representation:

The samples were collected between the days of 2018-03-05 and 2019-06-10 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):

Water data for the 2020/2022 integrated report in Region 3.

Line of Evidence (LOE) for Decision ID 129377, Enterococcus	Region 3
Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk

LOE ID:

150051

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

105

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for Pacific Ocean at Main Beach (Santa Cruz County), at Boardwalk to determine beneficial use support and the results are as follows: 95 of the 105 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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): Main-A

Temporal Representation:

The samples were collected between the days of 2017-01-03 and 2019-07-22 .

Environmental Conditions:

QAPP Information:

QAPP for 2020 Santa Cruz County Beachwatch data.

QAPP Information Reference(s):