National · EPA UCMR 5 Data · Educational Tool
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U.S. Public Water PFAS Monitoring Lookup

Enter a ZIP code to see EPA PFAS monitoring results for public water systems connected with that area.

Before you search: A ZIP code may list more than one water system, so match the system name to your water bill. This research snapshot uses EPA results received through January 15, 2026. For the newest federal records, use EPA’s Data Finder.
Frozen EPA UCMR 5 research snapshot through January 15, 2026. A ZIP search cannot confirm the water system for a specific home. These results do not determine current compliance, household tap concentration, personal exposure, or health risk.
About the project

Independent PFAS monitoring research

PFAS Estimator makes EPA public-water monitoring data easier to find and understand. It was built by Jack Zhang in Los Gatos, California. Joshua Tamayo-Sarver, MD, PhD, provided early feedback on clinical framing and limitations.

Read the methods and limitations → · Contact Jack

Independent research and education tool · Methods and limitations · Current EPA data
— ZIP searches