POLLUTION LOCATOR| Water | State Clean Water Act Status Report
Clean Water Act Status: MICHIGAN
 
 
  • 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 MICHIGAN or in the U.S. by assessed use impairments.
    Rank watersheds in MICHIGAN 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
    MICHIGAN contains a portion of 60 watersheds.
    Percentage of Surface Waters with Reported Problems (state + EPA data): 7%
    Number of Waterbodies with Reported Problems (as reported by the state): 267
    Beneficial uses not reported for 100% of waterbodies.

    Priority for Regulation     Number of Waterbodies
    Targeted 0
    High 46
    Medium 103
    Low 118
    Not Assessed for TMDL Priority 0
    Not Reported to US EPA for TMDL Priority 0
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 188
    Percent of Rivers, Streams and Creeks in MICHIGAN assessed by agencies for 1997-98 reporting period: 40%
      Percent Waterbodies Affected
    Impaired Biological Community 47%
    Pathogens 34%
    Nutrients 14%
    Organic Compounds 13%
    Mercury 9%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 78
    Percent of Lakes, Reservoirs and Ponds in MICHIGAN assessed by agencies for 1997-98 reporting period: 55%
      Percent Waterbodies Affected
    Mercury 73%
    Nutrients 12%
    Pathogens 10%
    Organic Compounds 8%
    Pesticides 4%
    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
    Pathogens 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: 188 (cause not reported for 100%)
    Percent of Rivers, Streams and Creeks in MICHIGAN assessed by agencies for 1997-98 reporting period: 40%
      Percent Waterbodies Affected
    Impairment source not reported 100%

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 78 (cause not reported for 100%)
    Percent of Lakes, Reservoirs and Ponds in MICHIGAN assessed by agencies for 1997-98 reporting period: 55%
      Percent Waterbodies Affected
    Impairment source not reported 100%

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 1 (cause not reported for 100%)
      Percent Waterbodies Affected
    Impairment source not reported 100%

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


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