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LakeQuality

Yes — Lake Chetek in Barron County, Wisconsin is on the EPA's Clean Water Act 303(d) impaired-waters list (2024 assessment cycle). It is cited for Nutrients (phosphorus, nitrogen). No cleanup plan (TMDL) has been completed yet. "Impaired" is a legal designation, separate from the lake's EPA condition class water-quality readings: it means at least one designated use (such as swimming, aquatic life, or fish consumption) does not meet state standards for the listed pollutant.

EPA 303(d) Listing

On 303(d) impaired listYes
Cleanup plan (TMDL)Not yet written
Assessment cycle2024
EPA IR category5R
Uses not supportedAquatic life, Recreation
EPA names this lake in the listingYes
LocationBarron County, Wisconsin

Pollutants Cited

Specific parameters in the EPA record: Phosphorus, Total.

What this means for using Lake Chetek

Because Lake Chetek is listed for Nutrients (phosphorus, nitrogen), swimming can be affected — check for posted beach advisories, especially after heavy rain or during visible algae. An impairment listing does not mean the lake is closed — most impaired lakes remain open for boating and swimming. It means a specific pollutant exceeds a standard for a specific use. See the full breakdown on the lake report. The official EPA assessment is available in the ATTAINS waterbody report.

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