| Water Body Name: | Seal Beach (Orange County) |
| Water Body ID: | CAX8011100019991013160405 |
| Water Body Type: | Coastal & Bay Shoreline |
DECISION ID |
149177 |
Region 8 |
Seal Beach (Orange County) |
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| Pollutant: | Indicator Bacteria |
| Final Listing Decision: | Do Not Delist from 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | Do Not Delist from 303(d) list (TMDL required list)(2018) |
| Revision Status | Revised |
| Sources: | A Source Unknown |
| Expected TMDL Completion Date: | 2037 |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for removal from the CWA section 303(d) List under sections 4.2 and 4.3 of the Listing Policy. Under these sections a single line of evidence is necessary to assess listing status. The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective. The Ocean Plan bacteria water quality objective for the SHEL beneficial use is expressed in total coliform. This waterbody is being considered for placement on or removal from the CWA section 303(d) List under section 3.3 or 4.3 of the Listing Policy, as applicable, using the fecal coliform, enterococci and total coliform objectives. Sixteen lines of evidence area available in the administrative record to assess this pollutant for the REC-1 beneficial use. 297 of 1838 samples exceed the 6-week Enterococcus Geomean Objective. 152 of 491 samples exceed the Enterococcus STV objective. 11 of 1098 samples exceed the monthly Fecal Coliform Geomean Objective. 120 of 2415 samples exceed the Fecal Coliform Single Sample Maximum Objective. However, at OSBO2 and OSBO3, 164 of 489 samples, and 77 of 463 samples, respectively exceed the 6-week Enterococcus Geomean objective and this exceeds the allowable frequency in Table 4.2 of the Listing Policy. Statistical threshold value (STV) exceedances would typically only be considered if there were insufficient samples available to calculate the geometric mean, in conformity with the Inland Surface Waters and Enclosed Bays and Estuaries Plan, Bacteria Provisions. Nevertheless, 75% of all sampling stations (3 of 4) in Seal Beach failed to meet the STV objectives during the period considered for this listing cycle. This is ample evidence that there is a continuing input of fecal contamination that has not yet been identified and mitigated. Eight lines of evidence are available in the administrative record to assess this pollutant for the SHEL beneficial use. 1474 of 2443 samples exceed the 90th-percentile objective for Total Coliform. 1229 of 2443 samples exceed the median objective for Total Coliform. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from 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. 297 of 1838 samples exceed the 6-week Enterococcus Geomean Objective, 11 of 1098 samples exceed the monthly Fecal Coliform Geomean Objective and 120 of 2415 samples exceed the Fecal Coliform Single Sample Maximum Objective for the protection of REC-1 beneficial uses and this does not exceed the allowable frequency listed in Table 4.2 of the Listing Policy. 4. At two stations, OSBO2 and OSBO3, 164 of 489 samples, and 77 of 463 samples, respectively exceed the 6-week Enterococcus Geomean Objective and this exceeds the allowable frequency in Table 4.2 of the Listing Policy. 5. 75% of all sampling stations (3 of 4) in Seal Beach failed to meet the STV objectives during the period considered for this listing cycle. This is ample evidence that there is a continuing input of fecal contamination that has not yet been identified and mitigated. 6. 1474 of 2443 samples exceed the 90th-percentile objective for Total Coliform and 1229 of 2443 samples exceed the median objective for Total Coliform for the SHEL beneficial use and this does exceed the allowable frequency listed in Table 4.2 of the Listing Policy. 7. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. While there is justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of the SHEL beneficial use, the Santa Ana Water Board considers this waterbody-pollutant combination lowest priority for TMDL development as the water quality objective for the SHEL beneficial use has been determined by the State Water Board to require updating. On December 3, 2019, the State Water Board adopted the 2019 Triennial Review of the Ocean Plan and identified as a high priority a project to consider amending the Ocean Plan to review and revise the existing shellfish harvesting total coliform objective. The State Water Board recognized that the current total coliform water quality objective may be unattainable, as exceedances of the standard were found to be common in reference-quality areas. Following the update of the water quality objective, this waterbody will be reassessed and reprioritized for TMDL development, if needed. In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or failure to address a human health risk. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. The historic LOEs are: 13 LOEs for enterococcus (4434 8241 8247 82471 82419 82472 82473 8244 82469 82470 8237 82474 8250), 1 LOE for E.coli (82475), 11 LOEs for Fecal coliform (82476 8242 8238 8251 8245 82481 82482 82479 82480 8248 82478), 12 LOEs for Total Coliform ( 82486 8252 8246 8243 82485 82484 82495 82494 82493 82492 8249 8240) and will be retired. For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches or inland surface waters from April 1 through October 31 only, and where collected from inland waters from April 1 through October 31 only, bacterial measurements must be indicative of human fecal matter, and there is substantial human contact in the waterbody. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | While there is justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of the SHEL beneficial use, the Santa Ana Water Board considers this waterbody-pollutant combination lowest priority for TMDL development as the water quality objective for the SHEL beneficial use has been determined by the State Water Board to require updating. On December 3, 2019, the State Water Board adopted the 2019 Triennial Review of the Ocean Plan and identified as a high priority a project to consider amending the Ocean Plan to review and revise the existing shellfish harvesting total coliform objective. The State Water Board recognized that the current total coliform water quality objective may be unattainable, as exceedances of the standard were found to be common in reference-quality areas. Following the update of the water quality objective, this waterbody will be reassessed and reprioritized for TMDL development, if needed. In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or failure to address a human health risk. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. The historic LOEs are: 13 LOEs for enterococcus (4434 8241 8247 82471 82419 82472 82473 8244 82469 82470 8237 82474 8250), 1 LOE for E.coli (82475), 11 LOEs for Fecal coliform (82476 8242 8238 8251 8245 82481 82482 82479 82480 8248 82478), 12 LOEs for Total Coliform ( 82486 8252 8246 8243 82485 82484 82495 82494 82493 82492 8249 8240) and will be retired. For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches or inland surface waters from April 1 through October 31 only, and where collected from inland waters from April 1 through October 31 only, bacterial measurements must be indicative of human fecal matter, and there is substantial human contact in the waterbody. |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
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| LOE ID: | 300864 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 489 | ||||
| Number of Exceedances: | 164 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 164 of the 489 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB02 (OSB02-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-14 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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|||||
| LOE ID: | 300799 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Median | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 471 | ||||
| Number of Exceedances: | 65 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 65 of the 471 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB04 (OSB04-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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| LOE ID: | 300773 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | 0.1 | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 511 | ||||
| Number of Exceedances: | 349 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 349 of the 511 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the shellfish beneficial use in ocean waters applies a threshold of 230 per 100 mL for total coliform, not to be exceeded by more than 10 percent of samples. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB05 (OSB05-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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| LOE ID: | 300856 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Median | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 517 | ||||
| Number of Exceedances: | 321 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 321 of the 517 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB03 (OSB03-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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| LOE ID: | 300759 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | 0.1 | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 944 | ||||
| Number of Exceedances: | 616 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 616 of the 944 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the shellfish beneficial use in ocean waters applies a threshold of 230 per 100 mL for total coliform, not to be exceeded by more than 10 percent of samples. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB02 (OSB02-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-14 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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| LOE ID: | 300756 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | 0.1 | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 517 | ||||
| Number of Exceedances: | 340 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 340 of the 517 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the shellfish beneficial use in ocean waters applies a threshold of 230 per 100 mL for total coliform, not to be exceeded by more than 10 percent of samples. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB03 (OSB03-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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| LOE ID: | 300851 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Median | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 944 | ||||
| Number of Exceedances: | 549 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 549 of the 944 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB02 (OSB02-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-14 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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| LOE ID: | 300753 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | 0.1 | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 471 | ||||
| Number of Exceedances: | 169 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 169 of the 471 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the shellfish beneficial use in ocean waters applies a threshold of 230 per 100 mL for total coliform, not to be exceeded by more than 10 percent of samples. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB04 (OSB04-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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| LOE ID: | 300727 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 197 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 0 of the 197 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB04 (OSB04-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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| LOE ID: | 300749 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 244 | ||||
| Number of Exceedances: | 7 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 7 of the 244 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB05 (OSB05-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
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| LOE ID: | 300816 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | SSM | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 951 | ||||
| Number of Exceedances: | 60 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 60 of the 951 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB02 (OSB02-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-14 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300810 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | SSM | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 503 | ||||
| Number of Exceedances: | 19 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 19 of the 503 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB03 (OSB03-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300838 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | SSM | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 453 | ||||
| Number of Exceedances: | 8 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 8 of the 453 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB04 (OSB04-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300832 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | SSM | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 508 | ||||
| Number of Exceedances: | 33 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 33 of the 508 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a single sample maximum of fecal coliform, not to exceed 400 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB05 (OSB05-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300784 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | STV | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 123 | ||||
| Number of Exceedances: | 75 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 75 of the 123 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB02 (OSB02-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-14 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300845 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 425 | ||||
| Number of Exceedances: | 9 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 9 of the 425 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB04 (OSB04-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300737 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 463 | ||||
| Number of Exceedances: | 77 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 77 of the 463 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB03 (OSB03-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300741 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 461 | ||||
| Number of Exceedances: | 47 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 47 of the 461 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial in ocean waters applies a six-week rolling geomean to enterococcus, not to exceed 30 cfu/100mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB05 (OSB05-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300850 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Median | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 511 | ||||
| Number of Exceedances: | 294 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 294 of the 511 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | In order to protect the shellfish benefical use in ocean waters, the median total coliform concentration shall not exceed 70 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB05 (OSB05-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300955 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | STV | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 123 | ||||
| Number of Exceedances: | 34 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 34 of the 123 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB03 (OSB03-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300964 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | STV | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 123 | ||||
| Number of Exceedances: | 28 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 28 of the 123 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB05 (OSB05-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300959 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | STV | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 122 | ||||
| Number of Exceedances: | 15 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 15 of the 122 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters, applies a Statistical Threshold Value to enterococcus of 110 cfu/100 mL, not to be exceeded by more than 10 percent of samples collected within in a calendar month. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB04 (OSB04-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300724 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 441 | ||||
| Number of Exceedances: | 2 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 2 of the 441 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB02 (OSB02-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-14 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300746 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 216 | ||||
| Number of Exceedances: | 2 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Seal Beach (Orange County) to determine beneficial use support and the results are as follows: 2 of the 216 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. | ||||
| Data Reference: | Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 8. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial use in ocean waters applies a 30 day geometric mean of fecal coliform based on the five most recent samples at each site, not to exceed 200 per 100 mL. (Ocean Plan 2019) | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): OSB03 (OSB03-Seal Beach Surfside, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2020-10-13 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
DECISION ID |
99245 |
Region 8 |
Seal Beach (Orange County) |
||
| Pollutant: | Trash |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
| Revision Status | Original |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. The one samples exceed the guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One sample exceeds the guideline but this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 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 not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| 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. |
|
|||||
| LOE ID: | 82496 | ||||
| Pollutant: | Trash | ||||
| LOE Subgroup: | Pollutant-Nuisance | ||||
| Matrix: | Not Recorded | ||||
| Fraction: | None | ||||
| Beneficial Use: | Non-Contact Recreation | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | Occurrence of conditions judged to cause impairment | ||||
| Data Used to Assess Water Quality: | Trash immediately distracts the eye at first glance and is densely located in and near the water body. Inspections of trash conditions, and cleanup efforts in the San Gabriel River Estuary were conducted on January 23, 2010. Numerous photos were taken and reviewed to assess trash conditions. All photos exhibit poor to very poor trash conditions within the estuary. The trash is too numerous to count, and the types of trash depicted in the photos include shopping carts, tires, toys, clothing, furniture, household items, bottles and cans. | ||||
| Data Reference: | Photos of trash on Seal Beach, Jan. 2010 | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Per the Region 8 Basin Plan narrative objective: Floatables are an aesthetic nuisance as well as a substrate for algae and insect vectors. Waste discharges shall not contain floating materials, including solids, liquids, foam or scum, which cause a nuisance or adversely affect beneficial uses. | ||||
| Objective/Criterion Reference: | Water Quality Control Plan, Santa Ana River Basin | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | All photos were either taken down coast from the San Gabriel River jetty, or up coast from Seal Beach pier. . | ||||
| Temporal Representation: | All photos were taken on 1/23/10. | ||||
| Environmental Conditions: | Trash and debris are deposited on beaches after wet weather events. | ||||
| QAPP Information: | None. | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
90706 |
Region 8 |
Seal Beach (Orange County) |
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| Pollutant: | pH |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
| Revision Status | Original |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section three (3) of the Listing Policy. Under section 3.2, a single line of evidence is necessary to assess the listing status.
One (1) line of evidence is available in the administrative record to assess this pollutant. Zero (0) of the one (1) sample exceed the Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero (0) of one (1) sample exceeds the Objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 26 samples are needed to determine if a beneficial use is fully supported using table 3.2. 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 not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. |
| 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. |
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| LOE ID: | 82483 | ||||
| Pollutant: | pH | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Dissolved | ||||
| Beneficial Use: | Estuarine Habitat | ||||
| Number of Samples: | 1 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Numeric data generated from 1 samples of pH data had no exceedences. | ||||
| Data Reference: | Data for bacteria in various waterbodies, Feb. 2005-May 2007 | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The pH of bay or estuary waters shall not be raised above 8.6 or depressed below 7.0 as a result of controllable water quality factors... | ||||
| Objective/Criterion Reference: | Water Quality Control Plan, Santa Ana River Basin | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Samples were collected from the Seal Beach Pier station. | ||||
| Temporal Representation: | One sample was collected on 5/5/2007. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | NPDES quality assurance. | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
69741 |
Region 8 |
Seal Beach (Orange County) |
||
| Pollutant: | PCBs (Polychlorinated biphenyls) |
| Final Listing Decision: | List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
| Revision Status | Original |
| Sources: | A Source Unknown |
| Expected TMDL Completion Date: | 2019 |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle.
This pollutant is being considered for placement on the section 303(d) list under section 3.5 of the Listing Policy. One line of evidence is available in the administrative record to assess this pollutant. 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 section 303(d) list in the Water Quality Limited Segments category. 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 of the 5 samples exceeded the OEHHA Screening Value and this exceeds the allowable frequency listed in Table 3.1 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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| LOE ID: | 3627 | ||||
| Pollutant: | PCBs (Polychlorinated biphenyls) | ||||
| LOE Subgroup: | Pollutant-Tissue | ||||
| Matrix: | Tissue | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 5 | ||||
| Number of Exceedances: | 5 | ||||
| Data and Information Type: | Fish tissue analysis | ||||
| Data Used to Assess Water Quality: | Five out of 5 samples exceeded. Three white croaker and two yellowfin croaker samples were collected. All samples were filet composites. All samples exceeded guideline (TSMP, 2002). | ||||
| Data Reference: | Placeholder reference 2006 303(d) | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Santa Ana River Basin RWQCB Basin Plan: Toxic substances shall not be discharged at levels that will bioaccumulate in aquatic resources to levels which are harmful to human health. | ||||
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) | ||||
| Evaluation Guideline: | 20 ng/g (OEHHA Screening Value). | ||||
| Guideline Reference: | Placeholder reference 2006 303(d) | ||||
| Spatial Representation: | One station at Seal Beach was sampled. | ||||
| Temporal Representation: | Samples were collected in May and October 1999. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | CFCP 1998 Year 1 QA Summary: Pesticides and PCBs. California Department of Fish and Game.
CDFG Fish and Wildlife Water Pollution Control Laboratory Data Quality Assurance Report. 1999 Coastal Fish Contamination Program (CFCP Year 2). California Department of Fish and Game. |
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| QAPP Information Reference(s): | |||||