| Water Body Name: | Little Corona Del Mar Beach |
| Water Body ID: | CAX8011400020021003092240 |
| Water Body Type: | Coastal & Bay Shoreline |
DECISION ID |
149153 |
Region 8 |
Little Corona Del Mar Beach |
||
| Pollutant: | Indicator Bacteria |
| Final Listing Decision: | Do Not Delist from 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | List on 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. Eight (8) lines of evidence area available in the administrative record to assess this pollutant for the REC-1 beneficial use. Fifty-three (53) of 393 samples exceed the 6-week Enterococcus Geomean Objective. Forty-four (44) of 125 samples exceed the Enterococcus Statistical Threshold Value Objective. One (1) of 160 samples exceed the monthly Fecal Coliform Geomean Objective. Thirty (30) of 466 samples exceed the Fecal Coliform Single Sample Maximum Objective. Four (4) lines of evidence are available in the administrative record to assess this pollutant for the SHEL beneficial use. Three hundred and eight (308) of 495 samples exceed the 90th-percentile objective for Total Coliform. Two hundred and nine (209) of 495 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 for removing this water segment-pollutant combination from the CWA section 303(d) List for impairment of REC-1 beneficial uses. However, there is sufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of the SHEL beneficial use. 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. Fifty-three (53) of 393 samples exceed the 6-week Enterococcus Geomean Objective for the REC-1 beneficial use, One (1) of 160 samples exceed the monthly Fecal Coliform Geomean Objective for the REC-1 beneficial use, and Thirty (30) of 466 samples exceed the Fecal Coliform Single Sample Maximum Objective for the REC-1 beneficial use, and this does not exceed the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Three hundred and eight (308) of 495 samples exceed the 90th-percentile objective for Total Coliform for the SHEL beneficial use and two hundred and nine (209) of 495 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. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. 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. 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 lines of evidence are: 4 LOEs for enterococcus (95690, 81709, 81708, 95689), 4 LOEs for Fecal Colform (81713, 81714, 95692, 95691), and 4 LOEs for Total Coliform (95694, 81715, 95693, 81716) and will be retired. Truncated language from a previous cycle: Thirty Three (33) of 128 samples exceed the Enterococcus Geomean Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for 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. Thirty Three (33) of the 128 samples exceed the Enterococcus Geomean Objective, Zero (0) of the 144 samples exceed the Fecal Coliform Geomean Objective, Two (2) of the 144 samples exceed the Total Coliform Geomean, and the Enterococcus Geomean does exceed the frequency listed in table 3.2 4. Twenty Six (26) of the 170 samples exceed the Enterococcus Single Sample Objective, Five (5) of the 170 samples exceed the Fecal Coliform Single Sample Objective, Zero (0) of the 170 samples exceed the Total Coliform Single Sample, and this does not exceed the frequency listed in table 3.2 5. 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 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 lines of evidence are: 4 LOEs for enterococcus (95690, 81709, 81708, 95689), 4 LOEs for Fecal Colform (81713, 81714, 95692, 95691), and 4 LOEs for Total Coliform (95694, 81715, 95693, 81716) and will be retired. Truncated language from a previous cycle: Thirty Three (33) of 128 samples exceed the Enterococcus Geomean Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for 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. Thirty Three (33) of the 128 samples exceed the Enterococcus Geomean Objective, Zero (0) of the 144 samples exceed the Fecal Coliform Geomean Objective, Two (2) of the 144 samples exceed the Total Coliform Geomean, and the Enterococcus Geomean does exceed the frequency listed in table 3.2 4. Twenty Six (26) of the 170 samples exceed the Enterococcus Single Sample Objective, Five (5) of the 170 samples exceed the Fecal Coliform Single Sample Objective, Zero (0) of the 170 samples exceed the Total Coliform Single Sample, and this does not exceed the frequency listed in table 3.2 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 300791 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Median | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 464 | ||||
| Number of Exceedances: | 194 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 194 of the 464 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): BGCD (BGCD-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-09-09 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: | 300708 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | 0.1 | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 31 | ||||
| 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 Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 9 of the 31 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): ONB31 (ONB31-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2011-07-20 and 2015-03-27 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300707 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | 0.1 | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 464 | ||||
| Number of Exceedances: | 299 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 299 of the 464 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): BGCD (BGCD-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-09-09 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: | 300828 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | SSM | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 440 | ||||
| Number of Exceedances: | 29 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 29 of the 440 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): BGCD (BGCD-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-09-09 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: | 300712 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 2 | ||||
| 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 Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 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): ONB31 (ONB31-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2011-09-28 and 2015-03-27 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300857 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Median | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 31 | ||||
| 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 Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 15 of the 31 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): ONB31 (ONB31-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2011-07-20 and 2015-03-27 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300720 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 158 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 1 of the 158 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): BGCD (BGCD-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-09-09 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: | 300963 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | STV | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 17 | ||||
| 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 Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 2 of the 17 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): ONB31 (ONB31-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2011-08-13 and 2015-03-27 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300876 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 3 | ||||
| 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 Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 0 of the 3 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): ONB31 (ONB31-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2011-08-13 and 2015-03-27 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||
|
|||||
| LOE ID: | 300847 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | GeoMean | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 390 | ||||
| Number of Exceedances: | 53 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 53 of the 390 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): BGCD (BGCD-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-09-09 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: | 300881 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | STV | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 108 | ||||
| Number of Exceedances: | 42 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 42 of the 108 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): BGCD (BGCD-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2010-09-09 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: | 300822 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | SSM | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 26 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed BeachWatch_Orange County data for Little Corona Del Mar Beach to determine beneficial use support and the results are as follows: 1 of the 26 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): ONB31 (ONB31-Newport Beach, Orange). | ||||
| Temporal Representation: | The samples were collected between the days of 2011-09-28 and 2015-03-27 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | State Board Staff. 2021. QAPP Reference for Beach Watch Program. | ||||
| QAPP Information Reference(s): | QAPP Reference for Beach Watch Program | ||||