US drinking water quality data by ZIP code — EPA violations, lead/copper levels, PFAS, radon, flood risk, and Home Safety Scores for 41,000+ ZIPs. 20 federal/state sources. Updated daily. 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
Jul 9, 2026