Final California 2024 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 2 - San Francisco Bay Region

Water Body Name: Keller Beach (San Francisco Bay, Central)
Water Body ID: CAC2031201020110712224833
Water Body Type: Coastal & Bay Shoreline
 
DECISION ID
148997
Region 2     
Keller Beach (San Francisco Bay, Central)
 
Pollutant: Indicator Bacteria
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Delist from 303(d) list (TMDL required list)(2018)
Revision Status Revised
Sources: A Source Unknown
Expected TMDL Completion Date: 2037
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. Seventy one of one hundred twenty-nine samples exceed the fecal coliform monthly median 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. Seventy one of one hundred twenty-nine samples exceed the fecal coliform monthly median objective and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 96992
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 216
Number of Exceedances: 18
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Keller Beach to determine beneficial use support and results are as follows: eighteen of two hundred sixteen geometric means (calculated weekly) exceeded the objective. We required a minimum of 5 samples to compute each valid geomean, consistent with the objective.
Data Reference: Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The objective is a six-week rolling geometric mean (calculated weekly), not to exceed 30 cfu/100 mL.
Objective/Criterion Reference: Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at stations Mid Beach, North Beach, and South Beach. The results from these stations were averaged because they were located within 200 meters.
Temporal Representation: The data were collected year-round. This LOE replaces #90761, which included data from April 2007 to September 2010. This new LOE also includes data from 2010 through May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The data were collected through the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299723
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 71
Number of Exceedances: 70
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 70 of the 71 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration at each station, and is calculated as a 30-day median.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The total coliform objective for shellfish harvesting is a 30-day median less than 70 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller South Beach (South Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299614
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 281
Number of Exceedances: 31
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 31 of the 281 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 use where the salinity is 1 ppth or higher 95 percent or more of the time applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (ISWEBE 2018)
Objective/Criterion Reference: Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller South Beach (South Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299805
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 287
Number of Exceedances: 21
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 21 of the 287 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 use where the salinity is 1 ppth or higher 95 percent or more of the time applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (ISWEBE 2018)
Objective/Criterion Reference: Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller North Beach (North Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299724
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 120
Number of Exceedances: 30
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 30 of the 120 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 where the salinity is 1 ppth or higher 95 percent or more of the time 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. (ISWEBE 2018)
Objective/Criterion Reference: Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller South Beach (South Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299761
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 21
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 0 of the 21 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 use where the salinity is 1 ppth or higher 95 percent or more of the time applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (ISWEBE 2018)
Objective/Criterion Reference: Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller Mid Beach (Mid Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2011-11-28 .
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 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299850
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 119
Number of Exceedances: 27
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 27 of the 119 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 where the salinity is 1 ppth or higher 95 percent or more of the time 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. (ISWEBE 2018)
Objective/Criterion Reference: Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller North Beach (North Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299783
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 14
Number of Exceedances: 1
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 1 of the 14 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 where the salinity is 1 ppth or higher 95 percent or more of the time 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. (ISWEBE 2018)
Objective/Criterion Reference: Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller Mid Beach (Mid Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2011-11-28 .
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 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299551
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Mean
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 59
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 0 of the 59 samples exceeded the 30-day mean water quality threshold for Coliform, Fecal.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for non-contact recreation is a 30-day mean less than 2000 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller North Beach (North Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-14 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299726
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 14
Number of Exceedances: 4
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 4 of the 14 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-day 90% percentile.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for shellfish harvesting is a 30-day 90th percentile less than 43 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller Mid Beach (Mid Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2011-11-28 .
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 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299825
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 0 of the 14 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-day 90% percentile.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for non-contact recreation is a 30-day 90th percentile less than 4000 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller Mid Beach (Mid Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2011-11-28 .
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 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299702
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 120
Number of Exceedances: 56
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 56 of the 120 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-day 90% percentile.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for shellfish harvesting is a 30-day 90th percentile less than 43 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller North Beach (North Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-14 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299891
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Mean
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 64
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 0 of the 64 samples exceeded the 30-day mean water quality threshold for Coliform, Fecal.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for non-contact recreation is a 30-day mean less than 2000 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller South Beach (South Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299680
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 6
Number of Exceedances: 3
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 3 of the 6 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold for shellfish is based on the median concentration at each station, and is calculated as a 30-day median.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for shellfish harvesting is a 30-day median less than 14 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller Mid Beach (Mid Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2011-11-28 .
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 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299549
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Mean
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 6
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 0 of the 6 samples exceeded the 30-day mean water quality threshold for Coliform, Fecal.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for non-contact recreation is a 30-day mean less than 2000 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller Mid Beach (Mid Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2011-11-28 .
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 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299679
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 119
Number of Exceedances: 58
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 58 of the 119 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-day 90% percentile.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for shellfish harvesting is a 30-day 90th percentile less than 43 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller South Beach (South Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299785
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 64
Number of Exceedances: 35
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 35 of the 64 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold for shellfish is based on the median concentration at each station, and is calculated as a 30-day median.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for shellfish harvesting is a 30-day median less than 14 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller South Beach (South Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299742
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 59
Number of Exceedances: 33
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 33 of the 59 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold for shellfish is based on the median concentration at each station, and is calculated as a 30-day median.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for shellfish harvesting is a 30-day median less than 14 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller North Beach (North Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-14 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299806
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 119
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 0 of the 119 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-day 90% percentile.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for non-contact recreation is a 30-day 90th percentile less than 4000 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller South Beach (South Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299547
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 120
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 0 of the 120 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-day 90% percentile.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The fecal coliform objective for non-contact recreation is a 30-day 90th percentile less than 4000 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller North Beach (North Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-14 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299616
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 22
Number of Exceedances: 17
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 17 of the 22 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 30-day 90% percentile.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The total coliform objective for shellfish harvesting is a 30-day 90th percentile less than 230 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller North Beach (North Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299635
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 71
Number of Exceedances: 69
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 69 of the 71 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration at each station, and is calculated as a 30-day median.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The total coliform objective for shellfish harvesting is a 30-day median less than 70 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller North Beach (North Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299784
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 9
Number of Exceedances: 9
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 9 of the 9 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration at each station, and is calculated as a 30-day median.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The total coliform objective for shellfish harvesting is a 30-day median less than 70 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller Mid Beach (Mid Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2011-11-28 .
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 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 299570
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 23
Number of Exceedances: 18
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Keller Beach (San Francisco Bay, Central) to determine beneficial use support and the results are as follows: 18 of the 23 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 30-day 90% percentile.
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: Water Quality Control Plan, San Francisco Bay Basin, Chapter III Water Quality Objectives, Section 3.3.1 Bacteria: Table 3-1 provides a summary of the bacterial water quality objectives and identifies the sources of those objectives. The total coliform objective for shellfish harvesting is a 30-day 90th percentile less than 230 MPN/100 ML.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Keller South Beach (South Beach-Keller Beach (Contra Costa Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-07 and 2020-10-13 .
Environmental Conditions:
QAPP Information: State Board Staff. 2021. QAPP Reference for Beach Watch Program.
QAPP Information Reference(s): QAPP Reference for Beach Watch Program
 
Line of Evidence (LOE) for Decision ID 148997, Indicator Bacteria
Region 2     
Keller Beach (San Francisco Bay, Central)
 
LOE ID: 96993
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 100
Number of Exceedances: 25
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Keller Beach to determine beneficial use support and results are as follows: twenty-five of one hundred STVs (calculated monthly) exceeded the objective.
Data Reference: Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The objective is a statistical threshold value (STV) of 110 cfu/100 mL, not to be exceeded more than 10 percent of the time, calculated monthly.
Objective/Criterion Reference: Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at stations Mid Beach, North Beach, and South Beach. The results from these stations were averaged because they were located within 200 meters.
Temporal Representation: The data were collected year-round. This LOE replaces #90518, which included data from April 2007 to September 2010. This new LOE also includes data from 2010 through May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The data were collected through the Beach Watch program.
QAPP Information Reference(s):