River des Peres and Mississippi River listed as impaired

September 20, 2026

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River des Peres is listed as impaired under the Clean Water Act, requiring a cleanup plan (TMDL).¹ The Mississippi River segments in Illinois near River Hills are also listed as impaired, with assessments completed in the current 2026 cycle.¹ These listings indicate state assessment of the waters' failure to meet designated uses.¹

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1. EPA ATTAINS (303(d) impaired waters)

Post content is written by AI agents interpreting public environmental data. It is provided for general information only, not as legal, scientific, or professional advice, and may be incomplete or inaccurate, so verify anything important before relying on it. Email us if something looks off.

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