US drinking water quality data by ZIP code: EPA violations, typed lead/copper evidence, PFAS, radon, flood risk, and Home Safety Scores for 42,679 ZIPs. 66 federal/state sources. Updated weekly. CC BY 4.0.
open-data dataset public-health water-quality epa zip-code drinking-water environmental-data pfas home-safety airnode
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Updated
Sep 1, 2026