PFAS Contamination Near You

Check the drinking water where you live. Enter your ZIP code on the KnowYourExposure homepage to see the PFAS, lead, and other contaminants your local water utility has reported to the EPA, how they compare to federal limits, and what filters reduce them.

Find Your Local Water Data

Our data covers every US public water system tested under the EPA's UCMR5 (2023-2025) PFAS program, the Lead and Copper Rule, and SDWIS contaminant monitoring. Look up your city, county, or ZIP code to see what has been detected.