Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
300243 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
GeoMean |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. This data is for an AB411 beach. This LOE specifically corresponds with dry weather samples and only includes samples collected between April 1 and October 31 of each year. |
Data Reference: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - CENTRAL (STINSON BEACH - CENTRAL-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2015-09-08 and 2015-10-27 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
300242 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
SSM |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
8 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach 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. This data is for an AB411 beach. This LOE specifically corresponds with dry weather samples and only includes samples collected between April 1 and October 31 of each year. |
Data Reference: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - SOUTH (STINSON BEACH - SOUTH-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2015-09-08 and 2015-10-27 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
300261 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
SSM |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
8 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 1 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. This data is for an AB411 beach. This LOE specifically corresponds with dry weather samples and only includes samples collected between April 1 and October 31 of each year. |
Data Reference: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - NORTH (STINSON BEACH - NORTH-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2015-09-08 and 2015-10-27 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
300282 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
GeoMean |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. This data is for an AB411 beach. This LOE specifically corresponds with dry weather samples and only includes samples collected between April 1 and October 31 of each year. |
Data Reference: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - SOUTH (STINSON BEACH - SOUTH-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2015-09-08 and 2015-10-27 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
300523 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
SSM |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
8 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 1 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. This data is for an AB411 beach. This LOE specifically corresponds with dry weather samples and only includes samples collected between April 1 and October 31 of each year. |
Data Reference: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - CENTRAL (STINSON BEACH - CENTRAL-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2015-09-08 and 2015-10-27 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
300539 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
GeoMean |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
4 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. This data is for an AB411 beach. This LOE specifically corresponds with dry weather samples and only includes samples collected between April 1 and October 31 of each year. |
Data Reference: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - NORTH (STINSON BEACH - NORTH-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2015-09-08 and 2015-10-27 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
299575 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
STV |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
59 |
Number of Exceedances: |
3 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 3 of the 59 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: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - SOUTH (STINSON BEACH - SOUTH-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2010-09-15 and 2020-10-15 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
299854 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
GeoMean |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
160 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 0 of the 160 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. |
Data Reference: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - NORTH (STINSON BEACH - NORTH-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2010-09-08 and 2020-10-15 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
300157 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
GeoMean |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
149 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 0 of the 149 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. |
Data Reference: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - SOUTH (STINSON BEACH - SOUTH-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2010-09-15 and 2020-10-15 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
300133 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
STV |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
65 |
Number of Exceedances: |
10 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 10 of the 65 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: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - CENTRAL (STINSON BEACH - CENTRAL-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2010-09-15 and 2020-10-15 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
299810 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
GeoMean |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
158 |
Number of Exceedances: |
6 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 6 of the 158 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. |
Data Reference: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - CENTRAL (STINSON BEACH - CENTRAL-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2010-09-15 and 2020-10-15 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
90656 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
134 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
Not Specified |
Data Used to Assess Water Quality: |
Zero of the 134 geomeans exceeded the objective. |
Data Reference: |
Data for Region 2 Beach Watch. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The geometric mean standard for fecal coliform states that the fecal coliform density shall not exceed 200 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 at the South Stinson Beach site. |
Temporal Representation: |
Samples were collected from April 2005 to August 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 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
90651 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
131 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
Not Specified |
Data Used to Assess Water Quality: |
Zero of the 131 geomeans exceeded the objective. |
Data Reference: |
Data for Region 2 Beach Watch. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The geometric mean standard for fecal coliform states that the fecal coliform density shall not exceed 200 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 at the North Stinson Beach site. |
Temporal Representation: |
Samples were collected from April 2005 to August 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 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
90650 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
135 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
Not Specified |
Data Used to Assess Water Quality: |
Zero of the 135 geomeans exceeded the objective. |
Data Reference: |
Data for Region 2 Beach Watch. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The geometric mean standard for fecal coliform states that the fecal coliform density shall not exceed 200 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 at the Central Stinson Beach site. |
Temporal Representation: |
Samples were collected from April 2005 to August 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 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
90814 |
|
Pollutant: |
Fecal Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
499 |
Number of Exceedances: |
1 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch data for Pacific Ocean at Stinson Beach to determine beneficial use support and results are as follows: 1 of 499 samples exceed the criterion for Coliform, Fecal. |
Data Reference: |
Data for Region 2 Beach Watch. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
California Ocean Plan (SWRCB 2009) states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL |
Objective/Criterion Reference: |
California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
Data for this line of evidence for Pacific Ocean at Stinson Beach was collected at 3 monitoring sites [ Stinson Beach - Central, Stinson Beach - North, Stinson Beach South] |
Temporal Representation: |
Data was collected over the time period 4/7/2005-8/25/2010. |
Environmental Conditions: |
Staff is not aware of any special conditions that might affect interpretation of the data. |
QAPP Information: |
The samples were collected for the Beach Watch program. |
QAPP Information Reference(s): |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
90653 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
131 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
Not Specified |
Data Used to Assess Water Quality: |
Zero of the 131 geomeans exceeded the objective. |
Data Reference: |
Data for Region 2 Beach Watch. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The geometric mean standard for entercoccus 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 at the North Stinson Beach site. |
Temporal Representation: |
Samples were collected from April 2005 to August 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 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
90648 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
135 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
Not Specified |
Data Used to Assess Water Quality: |
Zero of the 135 geomeans exceeded the objective. |
Data Reference: |
Data for Region 2 Beach Watch. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The geometric mean standard for entercoccus 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 at the Central Stinson Beach site. |
Temporal Representation: |
Samples were collected from April 2005 to August 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 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
90905 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
499 |
Number of Exceedances: |
9 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch data for Pacific Ocean at Stinson Beach to determine beneficial use support and results are as follows: 9 of 499 samples exceed the criterion for Enterococci. |
Data Reference: |
Data for Region 2 Beach Watch. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
California Ocean Plan (SWRCB 2009) states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL. |
Objective/Criterion Reference: |
California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
Data for this line of evidence for Pacific Ocean at Stinson Beach was collected at 3 monitoring sites [ Stinson Beach - Central, Stinson Beach - North, Stinson Beach South] |
Temporal Representation: |
Data was collected over the time period 4/7/2005-8/25/2010. |
Environmental Conditions: |
Staff is not aware of any special conditions that might affect interpretation of the data. |
QAPP Information: |
The samples were collected for the Beach Watch program. |
QAPP Information Reference(s): |
|
Line of Evidence (LOE) for Decision ID 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
90654 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
134 |
Number of Exceedances: |
0 |
|
Data and Information Type: |
Not Specified |
Data Used to Assess Water Quality: |
Zero of the 134 geomeans exceeded the objective. |
Data Reference: |
Data for Region 2 Beach Watch. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The geometric mean standard for entercoccus 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 at the South Stinson Beach site. |
Temporal Representation: |
Samples were collected from April 2005 to August 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 148599, Indicator Bacteria
|
Region 2 |
Pacific Ocean at Stinson Beach |
|
|
LOE ID: |
299558 |
|
Pollutant: |
Enterococcus |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
STV |
|
Beneficial Use: |
Water Contact Recreation |
|
Number of Samples: |
66 |
Number of Exceedances: |
5 |
|
Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Water Board staff assessed BeachWatch_Marin County data for Pacific Ocean at Stinson Beach to determine beneficial use support and the results are as follows: 5 of the 66 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: |
WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 2. |
|
SWAMP Data: |
Non-SWAMP |
|
Water Quality Objective/Criterion: |
The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019) |
Objective/Criterion Reference: |
SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 |
|
Evaluation Guideline: |
|
Guideline Reference: |
|
Spatial Representation: |
The samples were collected at 1 monitoring site(s), station(s): STINSON BEACH - NORTH (STINSON BEACH - NORTH-Stinson Beach, Marin). |
Temporal Representation: |
The samples were collected between the days of 2010-09-08 and 2020-10-15 . |
Environmental Conditions: |
|
QAPP Information: |
State Board Staff. 2021. QAPP Reference for Beach Watch Program. |
QAPP Information Reference(s): |
QAPP Reference for Beach Watch Program |
|