WaterScore
WaterScore

A free public resource for understanding US drinking water. Built by a hydrogeologist.

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  • Search by address
  • Browse the map
  • Field Notes
Learn
  • Methodology
  • PFAS & the 2029 rule
About
  • About
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  • API
Data sources
EPA SDWIS · Safe Drinking Water Information System
UCMR5 · Unregulated Contaminant Monitoring Rule, 5th cycle
CCR archive · Consumer Confidence Reports, utility specific
USGS · Well data, well probability models
US Drought Monitor · Joint NOAA / USDA / NDMC
© 2026 WaterScore. Informational only — not a substitute for professional water testing.
Built by Marissa Fichera, hydrogeologist.