WaterScore — Free Water Quality Grades for Any US Address

WaterScore

Free public resource. No email required.

WaterScore

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

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Field Notes

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Methodology
PFAS & the 2029 rule

About

About
Contact
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

Built by Marissa Fichera, hydrogeologist.