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Polk County board receives Central Iowa source-water assessment; board approves multiple resolutions

5952990 · July 2, 2025
AI-Generated Content: All content on this page was generated by AI to highlight key points from the meeting. For complete details and context, we recommend watching the full video. so we can fix them.

Summary

Polk County supervisors received and filed the Central Iowa Source Water Research Assessment, heard about the report from scientists and dozens of public commenters, and approved a package of routine county agreements and permits during the same meeting.

The Polk County Board of Supervisors on Tuesday received and filed the Central Iowa Source Water Research Assessment (CISWRA), a multi-part scientific review commissioned by the county, and approved a slate of routine contracts, permit renewals and project agreements.

The report — which the board said was produced by 16 scientists who contributed roughly 4,400 hours of independent review and analysis — was funded in part with American Rescue Plan Act (ARPA) dollars. Supervisors said the board did not edit the report and that it stands as presented.

Why it matters: Commenters and county staff said the report documents continued high nitrate and bacterial contamination in the Des Moines and Raccoon river watersheds and recommends watershed-scale monitoring, numeric nutrient criteria, contingency plans and broader conservation practices. County officials said the findings will inform local programs and advocacy for state and federal resources.

Public comment opened the board’s discussion. Mike Tramontina, representing the Sierra Club, told…

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