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LakeQuality

Yes — Little Camas Reservoir in Elmore County, Idaho is on the EPA's Clean Water Act 303(d) impaired-waters list (2022 assessment cycle). It is cited for Hydrologic alteration. "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 listListed impaired
Cleanup plan (TMDL)Not yet written
Assessment cycle2022
EPA IR category4C
Uses not supportedAquatic life, Recreation
EPA names this lake in the listingYes
LocationElmore County, Idaho

Pollutants Cited

Specific parameters in the EPA record: Flow Regime Modification.

What this means for using Little Camas Reservoir

Review the EPA assessment and any state advisories before relying on Little Camas Reservoir for swimming, fishing, or other uses. 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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