Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2025. This website is no longer updated and links to external websites and some internal pages may not work. More information »

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

Comparing EPA Analytical Methods for PFAS in Drinking Water

Using EPA methods 533 and 537.1, a total of 29 unique per- and polyfluoroalkyl substances (PFAS) can effectively be measured in drinking water.

PFAS Analytes Measured using Methods 533 and 537.1 (pdf) (155.01 KB, December 2019, 815-B-19-021)

Comparing EPA Analytical Methods for PFAS in Drinking Water

Analytical Methods for Drinking Water