POLLUTION LOCATOR| Water | State Clean Water Act Status Report

Clean Water Act Status: WISCONSIN
 
 
  • 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 WISCONSIN or in the U.S. by assessed use impairments.
    Rank watersheds in WISCONSIN 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
    WISCONSIN contains a portion of 49 watersheds.
    Percentage of Surface Waters with Reported Problems (state + EPA data): 5%
    Number of Waterbodies with Reported Problems (as reported by the state): 451
    Beneficial Use Most Frequently Impaired Percent of All Impairments
    Aquatic Life Support 33%
    Beneficial uses not reported for 100% of waterbodies.


    Priority for Regulation     Number of Waterbodies
    Targeted 0
    High 0
    Medium 0
    Low 0
    Not Assessed for TMDL Priority 421
    Not Reported to US EPA for TMDL Priority 30
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 182
    Percent of Rivers, Streams and Creeks in WISCONSIN assessed by agencies for 1997-98 reporting period: 40%
      Percent Waterbodies Affected
    Other Habitat Alterations 71%
    Sediments 60%
    Flow Alterations 16%
    Low Dissolved Oxygen/Organic Enrichment 15%
    Nutrients 15%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 267 (cause not reported for 0%)
    Percent of Lakes, Reservoirs and Ponds in WISCONSIN assessed by agencies for 1997-98 reporting period: 65%
      Percent Waterbodies Affected
    Mercury 87%
    Nutrients 7%
    Sediments 6%
    pH 5%
    Organic Compounds 5%
    More...

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 1
      Percent Waterbodies Affected
    Organic Compounds 100%

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


    Fresh Water Wetlands
    Number of impaired waterbodies: 1
      Percent Waterbodies Affected
    Toxics 100%
    Other 100%

    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: 182 (cause not reported for 0%)
    Percent of Rivers, Streams and Creeks in WISCONSIN assessed by agencies for 1997-98 reporting period: 40%
      Percent Waterbodies Affected
    Nonpoint Sources 78%
    Contaminated Sediments 9%
    Other Sources 8%
    Atmospheric Deposition 5%
    Hydromodification/Habitat Modification 4%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 267
    Percent of Lakes, Reservoirs and Ponds in WISCONSIN assessed by agencies for 1997-98 reporting period: 65%
      Percent Waterbodies Affected
    Atmospheric Deposition 85%
    Nonpoint Sources 7%
    Contaminated Sediments 6%
    Other Sources 4%

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 1
      Percent Waterbodies Affected
    Other Sources 100%

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


    Fresh Water Wetlands
    Number of impaired waterbodies: 1
      Percent Waterbodies Affected
    Contaminated Sediments 100%
    Other Sources 100%

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