POLLUTION LOCATOR| Water | County Clean Water Act Status Report

Clean Water Act Status: LOS ANGELES County, CA
 
 
  • Clean Water Act Comparative Ranking
    Cleanest/Best Counties National Average Dirtiest/Worst Counties
    0%         50%         100%

    Percentage of Surface Waters with Impaired or Threatened Uses (state + EPA data):
    Number of Impaired Waterbodies (as reported by the state):

    NOTE: Data limitations affect the accuracy of these rankings.

    Rank counties in CALIFORNIA or in the U.S. by assessed use impairments.
    Rank watersheds in CALIFORNIA by assessed use impairments
    Rank states by assessed use impairments, impairments due to specific causes, or impairments due to specific sources

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  • 1998 Clean Water Act Status
    LOS ANGELES County contains a portion of 6 watersheds:
    Antelope-Fremont Valleys
    Los Angeles
    San Gabriel
    San Pedro Channel Islands
    Santa Clara
    Santa Monica Bay
    Percentage of Surface Waters with Reported Problems (state + EPA data): 25%
    Number of Waterbodies with Reported Problems (as reported by the state): 123

    Priority for Regulation     Number of Waterbodies
    Targeted 0
    High 49
    Medium 15
    Low 11
    Not Assessed for TMDL Priority 0
    Not Reported to US EPA for TMDL Priority 48
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 52
    Percent of Rivers, Streams and Creeks in CALIFORNIA assessed by agencies for 1997-98 reporting period: 8%
      Percent Waterbodies Affected
    Pathogens 69%
    Metals 50%
    Nutrients 48%
    Ammonia 37%
    Debris 37%
    More...

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 14
    Percent of Lakes, Reservoirs and Ponds in CALIFORNIA assessed by agencies for 1997-98 reporting period: 44%
      Percent Waterbodies Affected
    Nutrients 71%
    Metals 50%
    Low Dissolved Oxygen/Organic Enrichment 50%
    Debris 50%
    Aesthetics 43%
    More...

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 57
    Percent of Estuaries and Bays in CALIFORNIA assessed by agencies for 1997-98 reporting period: 89%
    Percent of Coastal Shorelines in CALIFORNIA assessed by agencies for 1997-98 reporting period: 57%
      Percent Waterbodies Affected
    Pathogens 82%
    Pesticides 68%
    PCBs 67%
    Contaminated Sediments 14%
    Metals 14%
    More...

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


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  • Leading Sources of Water Quality Problems
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 52
    Percent of Rivers, Streams and Creeks in CALIFORNIA assessed by agencies for 1997-98 reporting period: 8%
      Percent Waterbodies Affected
    Nonpoint Sources 100%
    Hydromodification/Habitat Modification 2%

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 14
    Percent of Lakes, Reservoirs and Ponds in CALIFORNIA assessed by agencies for 1997-98 reporting period: 44%
      Percent Waterbodies Affected
    Nonpoint Sources 100%

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 57
    Percent of Estuaries and Bays in CALIFORNIA assessed by agencies for 1997-98 reporting period: 89%
    Percent of Coastal Shorelines in CALIFORNIA assessed by agencies for 1997-98 reporting period: 57%
      Percent Waterbodies Affected
    Nonpoint Sources 100%
    Agriculture 2%
    Silviculture 2%

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


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    Email EPA
    Join an online discussion about pollution in LOS ANGELES County


    Email a Scorecard Community Report to a friend
    Network with environmental groups
    Learn how to use Scorecard to find out about toxics in your community


    Contribute to Environmental Defense
    Volunteer with environmental groups in your community

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  • Links
    Scorecard's report on
    Drinking Water Sources for this County
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