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

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

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

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