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-source Home Safety Score algorithm (0-100, A-F) used across 42,679 US ZIP records. 66 sources include EPA SDWIS/ECHO/LCR, PFAS, state MCLs, radon, FEMA flood, CDC blood lead, and Census housing age.
