POLLUTION LOCATOR| Water | State Clean Water Act Status Report

Clean Water Act Status: IDAHO
 
 
  • 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 IDAHO or in the U.S. by assessed use impairments.
    Rank watersheds in IDAHO 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
    IDAHO contains a portion of 80 watersheds.
    Percentage of Surface Waters with Reported Problems (state + EPA data): 8%
    Number of Waterbodies with Reported Problems (as reported by the state): 710
    Beneficial uses not reported for 100% of waterbodies.

    Priority for Regulation     Number of Waterbodies
    Targeted 245
    High 163
    Medium 300
    Low 0
    Not Assessed for TMDL Priority 0
    Not Reported to US EPA for TMDL Priority 2
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 670
    Percent of Rivers, Streams and Creeks in IDAHO assessed by agencies for 1997-98 reporting period: 11%
      Percent Waterbodies Affected
    Sediments 78%
    Nutrients 27%
    Flow Alterations 21%
    Temperature 21%
    Pathogens 17%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 40
    Percent of Lakes, Reservoirs and Ponds in IDAHO assessed by agencies for 1997-98 reporting period: 0%
      Percent Waterbodies Affected
    Sediments 68%
    Nutrients 65%
    Low Dissolved Oxygen/Organic Enrichment 58%
    Flow Alterations 32%
    Pathogens 20%
    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: 670 (cause not reported for 100%)
    Percent of Rivers, Streams and Creeks in IDAHO assessed by agencies for 1997-98 reporting period: 11%
      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: 40 (cause not reported for 100%)
    Percent of Lakes, Reservoirs and Ponds in IDAHO assessed by agencies for 1997-98 reporting period: 0%
      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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