POLLUTION LOCATOR| Water | State Clean Water Act Status Report

Clean Water Act Status: CALIFORNIA
 
 
  • Clean Water Act Comparative Ranking
    Cleanest/Best States National Average Dirtiest/Worst States
    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
    CALIFORNIA contains a portion of 146 watersheds.
    Percentage of Surface Waters with Reported Problems (state + EPA data): 15%
    Number of Waterbodies with Reported Problems (as reported by the state): 509
    Beneficial uses not reported for 100% of waterbodies.

    Priority for Regulation     Number of Waterbodies
    Targeted 0
    High 163
    Medium 91
    Low 159
    Not Assessed for TMDL Priority 0
    Not Reported to US EPA for TMDL Priority 96
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 303
    Percent of Rivers, Streams and Creeks in CALIFORNIA assessed by agencies for 1997-98 reporting period: 8%
      Percent Waterbodies Affected
    Pesticides 28%
    Metals 28%
    Nutrients 25%
    Pathogens 25%
    Sediments 24%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 64
    Percent of Lakes, Reservoirs and Ponds in CALIFORNIA assessed by agencies for 1997-98 reporting period: 44%
      Percent Waterbodies Affected
    Nutrients 38%
    Metals 34%
    Mercury 20%
    Low Dissolved Oxygen/Organic Enrichment 20%
    Salinity/TDS/Chlorides 17%
    More...

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 127
    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 72%
    Pesticides 51%
    PCBs 40%
    Metals 25%
    Nutrients 14%
    More...

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


    Fresh Water Wetlands
    Number of impaired waterbodies: 15
      Percent Waterbodies Affected
    Metals 47%
    Nutrients 40%
    Pesticides 27%
    Salinity/TDS/Chlorides 20%
    Sediments 13%
    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: 303
    Percent of Rivers, Streams and Creeks in CALIFORNIA assessed by agencies for 1997-98 reporting period: 8%
      Percent Waterbodies Affected
    Nonpoint Sources 54%
    Agriculture 29%
    Urban Runoff/Storm Sewers 23%
    Resource Extraction 16%
    Hydromodification/Habitat Modification 11%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 64
    Percent of Lakes, Reservoirs and Ponds in CALIFORNIA assessed by agencies for 1997-98 reporting period: 44%
      Percent Waterbodies Affected
    Nonpoint Sources 56%
    Natural Sources 22%
    Resource Extraction 19%
    Hydromodification/Habitat Modification 17%
    Unknown Sources 14%
    More...

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 127
    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 93%
    Agriculture 17%
    Urban Runoff/Storm Sewers 16%
    Resource Extraction 10%
    Marinas 9%
    More...

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


    Fresh Water Wetlands
    Number of impaired waterbodies: 15
      Percent Waterbodies Affected
    Natural Sources 60%
    Agriculture 40%
    Nonpoint Sources 40%
    Urban Runoff/Storm Sewers 20%
    Construction 13%
    More...

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