Is Your Tap Water Safe?
Free, independent water quality reports for every US city. Check contaminants, PFAS levels, violations, and get filter recommendations.
Powered by EPA SDWIS and UCMR5 data
176M+
Americans with PFAS in their water
30,000+
Cities with water quality data
100%
Free, EPA-sourced data
US Water Quality at a Glance
Click any state to explore water quality data, or view the full interactive map.
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Water Quality:
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What Are PFAS in Drinking Water?
PFAS (per- and polyfluoroalkyl substances) are a group of manufactured chemicals that have been used in industry and consumer products since the 1940s. They are called "forever chemicals" because they do not break down in the environment. In March 2026, EPA data confirmed PFAS in the water supplies of communities serving over 176 million Americans.