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

Supporting Information

Regional Board 2 - San Francisco Bay Region

Water Body Name: Crown Beach (San Francisco Bay, Lower)
Water Body ID: CAC2042004020161017060616
Water Body Type: Coastal & Bay Shoreline
 
DECISION ID
151067
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
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: Pollution
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under sections 2.2 and 3.3 of the Listing Policy. Under section 3.3 of the Policy, a minimum of one line of evidence is needed to assess listing status.

Multiple lines of evidence are available in the administrative record to assess this pollutant. More than five hundred of the seven hundred and ninety-nine samples exceed the monthly median total coliform objective for shellfish harvesting.

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 forty-seven samples exceed the monthly median total coliform 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299867
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 107
Number of Exceedances: 37
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 37 of the 107 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): Crown Crab Cove (Crown Crab Cove-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2011-12-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299548
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 284
Number of Exceedances: 53
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 53 of the 284 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): Crown Crab Cove (Crown Crab Cove-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2011-12-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299826
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 284
Number of Exceedances: 37
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 37 of the 284 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): Crown Bird Sanctuary (Bird Sanctuary-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-20 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299727
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 120
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 17 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): Crown Sunset Rd. (Sunset Rd.-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-10-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299658
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 121
Number of Exceedances: 25
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 25 of the 121 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): Crown Bath House (Bath House-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299703
 
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 Crown Beach (San Francisco Bay, Lower) 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): Crown 2001 Shoreline Dr. (2001 Shoreline Dr.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299704
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 119
Number of Exceedances: 13
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 13 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): Crown Windsurfer Corner (Windsurfer Corner-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-27 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299636
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: STV
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 120
Number of Exceedances: 38
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 38 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): Crown Bird Sanctuary (Bird Sanctuary-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-20 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299764
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 121
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 121 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): Crown Sunset Rd. (Sunset Rd.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299571
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 121
Number of Exceedances: 67
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 67 of the 121 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): Crown Bath House (Bath House-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299827
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 121
Number of Exceedances: 55
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 55 of the 121 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): Crown Sunset Rd. (Sunset Rd.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299893
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 121
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 121 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): Crown Bird Sanctuary (Bird Sanctuary-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299657
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 62
Number of Exceedances: 14
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 14 of the 62 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): Crown Sunset Rd. (Sunset Rd.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299550
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Mean
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 67
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 67 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): Crown Bird Sanctuary (Bird Sanctuary-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299701
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 65
Number of Exceedances: 54
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 54 of the 65 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): Crown Crab Cove (Crown Crab Cove-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2011-12-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299683
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 121
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 121 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): Crown 2001 Shoreline Dr. (2001 Shoreline Dr.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299656
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 67
Number of Exceedances: 49
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 49 of the 67 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): Crown Bird Sanctuary (Bird Sanctuary-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299803
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 121
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 121 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): Crown Bath House (Bath House-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299552
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 107
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 107 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): Crown Crab Cove (Crown Crab Cove-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2011-12-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299871
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 58
Number of Exceedances: 14
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 14 of the 58 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): Crown Windsurfer Corner (Windsurfer Corner-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-20 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299612
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Mean
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 62
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 62 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): Crown Sunset Rd. (Sunset Rd.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299889
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Mean
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 65
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 65 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): Crown Crab Cove (Crown Crab Cove-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2011-12-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299638
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Mean
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 58
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 58 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): Crown Windsurfer Corner (Windsurfer Corner-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-20 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299615
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 68
Number of Exceedances: 41
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 41 of the 68 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): Crown 2001 Shoreline Dr. (2001 Shoreline Dr.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299848
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 107
Number of Exceedances: 88
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 88 of the 107 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): Crown Crab Cove (Crown Crab Cove-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2011-12-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299847
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 121
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 121 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): Crown Windsurfer Corner (Windsurfer Corner-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-20 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299828
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Mean
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 68
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 68 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): Crown 2001 Shoreline Dr. (2001 Shoreline Dr.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299807
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 121
Number of Exceedances: 48
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 48 of the 121 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): Crown Windsurfer Corner (Windsurfer Corner-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-20 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299595
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 121
Number of Exceedances: 87
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 87 of the 121 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): Crown 2001 Shoreline Dr. (2001 Shoreline Dr.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299592
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Mean
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 66
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 66 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): Crown Bath House (Bath House-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299594
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 121
Number of Exceedances: 99
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 99 of the 121 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): Crown Bird Sanctuary (Bird Sanctuary-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299660
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 66
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 21 of the 66 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): Crown Bath House (Bath House-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299593
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 67
Number of Exceedances: 65
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 65 of the 67 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): Crown Crab Cove (Crown Crab Cove-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2011-12-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299869
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 67
Number of Exceedances: 51
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 51 of the 67 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): Crown Windsurfer Corner (Windsurfer Corner-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299804
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 22
Number of Exceedances: 14
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 14 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): Crown Bath House (Bath House-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299639
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 72
Number of Exceedances: 60
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 60 of the 72 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): Crown Bath House (Bath House-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299760
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 71
Number of Exceedances: 63
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 63 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): Crown Bird Sanctuary (Bird Sanctuary-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299591
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 67
Number of Exceedances: 53
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 53 of the 67 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): Crown Sunset Rd. (Sunset Rd.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299868
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 23
Number of Exceedances: 15
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 15 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): Crown Sunset Rd. (Sunset Rd.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299572
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 22
Number of Exceedances: 16
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 16 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): Crown 2001 Shoreline Dr. (2001 Shoreline Dr.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95876
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 134
Number of Exceedances: 23
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Twenty three 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. San Francisco Bay Basin Water Quality Control Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at the bird sanctuary site.
Temporal Representation: Samples were collected from September 2006 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95864
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 120
Number of Exceedances: 2
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Two of the 120 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. San Francisco Bay Basin Water Quality Control Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at the Windsurfer Corner site.
Temporal Representation: Samples were collected from April 2007 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95870
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 124
Number of Exceedances: 12
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Twelve of the 124 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. San Francisco Bay Basin Water Quality Control Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at the 2001 Shoreline Drive site.
Temporal Representation: Samples were collected from September 2006 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95855
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 190
Number of Exceedances: 11
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at Bath House (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 11 of 190 samples exceed the criterion for Enterococci.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at Bath House (San Francisco Bay, Lower) was collected at 1 monitoring site [ Bath House]
Temporal Representation: Data was collected over the time period 3/7/2006-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95861
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 183
Number of Exceedances: 3
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at Windsurfer Corner (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 3 of 183 samples exceed the criterion for Enterococci.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at Windsurfer Corner (San Francisco Bay, Lower) was collected at 1 monitoring site [ Windsurf Corner]
Temporal Representation: Data was collected over the time period 3/7/2006-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95854
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 124
Number of Exceedances: 7
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Seven of the 124 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. San Francisco Bay Basin Water Quality Control Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at the Sunset Road site.
Temporal Representation: Samples were collected from April 2007 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95860
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 132
Number of Exceedances: 8
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Eight of the 132 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. San Francisco Bay Basin Water Quality Control Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at the bath house site.
Temporal Representation: Samples were collected from September 2006 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95867
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 185
Number of Exceedances: 12
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at 2001 Shoreline Dr (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 12 of 185 samples exceed the criterion for Enterococci.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at 2001 Shoreline Dr (San Francisco Bay, Lower) was collected at 1 monitoring site [ 2001 Shoreline Dr.]
Temporal Representation: Data was collected over the time period 3/7/2006-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95849
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 187
Number of Exceedances: 8
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at Sunset Rd (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 8 of 187 samples exceed the criterion for Enterococci.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at Sunset Rd (San Francisco Bay, Lower) was collected at 1 monitoring site [ Sunset Rd.]
Temporal Representation: Data was collected over the time period 3/7/2006-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95873
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 195
Number of Exceedances: 20
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at Bird Sanctuary (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 20 of 195 samples exceed the criterion for Enterococci.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at Bird Sanctuary (San Francisco Bay, Lower) was collected at 1 monitoring site [ Bird Sanctuary]
Temporal Representation: Data was collected over the time period 3/7/2006-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95872
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 191
Number of Exceedances: 11
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Eleven of the 191 geomeans exceeded the fecal coliform 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. San Francisco Bay Basin Water Quality Contol Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at station 2001 Shoreline Dr.
Temporal Representation: Samples were collected approximately once a week from January 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95858
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 198
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Zero of the 198 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. San Francisco Bay Basin Water Quality Control Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at the bath house site.
Temporal Representation: Samples were collected from January 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95851
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 299
Number of Exceedances: 16
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at Sunset Rd (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 16 of 299 samples exceed the criterion for Coliform, Fecal.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at Sunset Rd (San Francisco Bay, Lower) was collected at 1 monitoring site [ Sunset Rd.]
Temporal Representation: Data was collected over the time period 1/10/2005-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95869
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 297
Number of Exceedances: 24
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at 2001 Shoreline Dr (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 24 of 297 samples exceed the criterion for Coliform, Fecal.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at 2001 Shoreline Dr (San Francisco Bay, Lower) was collected at 1 monitoring site [ 2001 Shoreline Dr.]
Temporal Representation: Data was collected over the time period 1/10/2005-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95863
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 295
Number of Exceedances: 10
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at Windsurfer Corner (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 10 of 295 samples exceed the criterion for Coliform, Fecal.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at Windsurfer Corner (San Francisco Bay, Lower) was collected at 1 monitoring site [ Windsurf Corner]
Temporal Representation: Data was collected over the time period 1/10/2005-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95866
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 187
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Zero of the 187 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. San Francisco Bay Basin Water Quality Control Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at the Windsurfer Corner site.
Temporal Representation: Samples were collected from January 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95878
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 203
Number of Exceedances: 18
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Eighteen of the 203 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. San Francisco Bay Basin Water Quality Control Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at the bird sanctuary site.
Temporal Representation: Samples were collected from January 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95875
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 307
Number of Exceedances: 47
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at Bird Sanctuary (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 47 of 307 samples exceed the criterion for Coliform, Fecal.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at Bird Sanctuary (San Francisco Bay, Lower) was collected at 1 monitoring site [ Bird Sanctuary]
Temporal Representation: Data was collected over the time period 1/10/2005-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95852
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 191
Number of Exceedances: 6
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Six of the 191 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. San Francisco Bay Basin Water Quality Control Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at the Sunset Road site.
Temporal Representation: Samples were collected from January 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 95857
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 302
Number of Exceedances: 17
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach at Bath House (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: 17 of 302 samples exceed the criterion for Coliform, Fecal.
Data Reference: Data for Region 2 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The San Francisco Bay Basin Plan states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) San Francisco Bay Basin (Region 2)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Crown Beach at Bath House (San Francisco Bay, Lower) was collected at 1 monitoring site [ Bath House]
Temporal Representation: Data was collected over the time period 1/10/2005-8/30/2010.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299743
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 23
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 21 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): Crown Bird Sanctuary (Bird Sanctuary-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299890
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Median
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 69
Number of Exceedances: 62
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 62 of the 69 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): Crown 2001 Shoreline Dr. (2001 Shoreline Dr.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299613
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 25
Number of Exceedances: 24
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 24 of the 25 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): Crown Crab Cove (Crown Crab Cove-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2011-12-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299682
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: 90th percentile
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 22
Number of Exceedances: 13
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 13 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): Crown Windsurfer Corner (Windsurfer Corner-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96973
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 221
Number of Exceedances: 7
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach - Bath House site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: seven of the two hundred twenty-one six-week rolling geometric means 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 six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.
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 the Crown Beach Bath House site.
Temporal Representation: The data were collected throughout the year. This LOE replaces #95860, which included data collected from September 2006 to August 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 samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96975
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 197
Number of Exceedances: 1
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach - Sunset Road site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: one of the one hundred ninety-seven six-week rolling geometric means 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 six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.
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 the Crown Beach Sunset Road site.
Temporal Representation: The data were collected throughout the year.This LOE replaces #95854, which included data collected from April 2007 to August 2010. This new LOE also includes data collected 2010-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 samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96976
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 198
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach - Windsurfer Corner site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: zero of the one hundred ninety-eight six-week rolling geometric means 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 six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.
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 the Crown Beach Windsurfer Corner site.
Temporal Representation: The data were collected throughout the year. This LOE replaces #95864, which included data collected from April 2007 to August 2010. This new LOE also includes data collected from 2010-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 samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96974
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 228
Number of Exceedances: 36
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach - Bird Sanctuary site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: thirty-six of the two hundred twenty-eight six-week rolling geometric means 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 six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.
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 the Crown Beach Bird Sanctuary site.
Temporal Representation: The data were collected throughout the year. This LOE replaces #95876, which included data collected from September 2006 to August 2010. This new LOE also includes data collected from 2010 to 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 samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96977
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 102
Number of Exceedances: 26
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach 2001 Shoreline Drive site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: twenty-six of the one hundred two 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 statistical threshold value (STV) of 110 cfu/100 mL is 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: The samples were collected at the Crown Beach 2001 Shoreline Drive site.
Temporal Representation: The data were collected throughout the year. This LOE replaces #95867, which included data collected over the time period 3/7/2006-8/30/2010. This new LOE also includes data collected from 2010-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 samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96978
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 102
Number of Exceedances: 23
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach - Bath House site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: twenty-three of the one hundred two 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 statistical threshold value (STV) of 110 cfu/100 mL is 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: The samples were collected at the Crown Beach Bath House site.
Temporal Representation: The data were collected throughout the year. This LOE replaces #95855, which included data collected over the time period 3/7/2006-8/30/2010. This new LOE also includes data collected 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 samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96979
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 101
Number of Exceedances: 10
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach - Windsurfer Corner site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: ten of the one hundred one 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 statistical threshold value (STV) of 110 cfu/100 mL is 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: The samples were collected at the Crown Beach Windsurfer Corner site.
Temporal Representation: The data were collected throughout the year. This LOE replaces #95861, which included collected over the time period 3/7/2006-8/30/2010. This new LOE also includes data collected 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 samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96972
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 203
Number of Exceedances: 6
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach 2001 Shoreline Drive site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: six of the two hundred three six-week rolling geometric means 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 six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.
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 the Crown Beach 2001 Shoreline Drive site.
Temporal Representation: The data were collected throughout the year. This LOE replaces #95870, which included data collected from September 2006 to August 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 samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96980
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 101
Number of Exceedances: 16
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach - Sunset Road site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows:sixteen of the one hundred one 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 statistical threshold value (STV) of 110 cfu/100 mL is 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: The samples were collected at the Crown Beach Sunset Road site.
Temporal Representation: This LOE replaces #95849 which included data from 3/7/2006-8/30/2010.This new LOE also includes newer data collected from 2010 through May 3, 2017. These data were compared to the newly adopted enterococcus objectives to protect contact recreation. Data were collected throughout the calendar year.
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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 96981
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 102
Number of Exceedances: 33
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch data for Crown Beach - Bird Sanctuary site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: thirty-three of the one hundred two 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 statistical threshold value (STV) of 110 cfu/100 mL is 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: The samples were collected at the Crown Beach Bird Sanctuary site.
Temporal Representation: The data were collected throughout the year. This LOE replaces #95873 which included data collected over the time period 3/7/2006-8/30/2010. This new LOE also includes data collected from 2010 - 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 samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299786
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 281
Number of Exceedances: 19
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 19 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): Crown 2001 Shoreline Dr. (2001 Shoreline Dr.-Crown Beach (Alameda 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299681
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 240
Number of Exceedances: 2
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed BeachWatch- East Bay Parks District County data for Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 2 of the 240 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): Crown Sunset Rd. (Sunset Rd.-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-10-12 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299763
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 245
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 0 of the 245 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): Crown Windsurfer Corner (Windsurfer Corner-Crown Beach (Alameda Co), East Bay Parks District).
Temporal Representation: The samples were collected between the days of 2010-09-27 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 151067, Indicator Bacteria
Region 2     
Crown Beach (San Francisco Bay, Lower)
 
LOE ID: 299849
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: GeoMean
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 264
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 Crown Beach (San Francisco Bay, Lower) to determine beneficial use support and the results are as follows: 9 of the 264 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): Crown Bath House (Bath House-Crown Beach (Alameda 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