The water briefing · PFAS
EPA’s final PFAS survey data: what the complete results show
EPA has published the final dataset from its fifth Unregulated Contaminant Monitoring Rule (UCMR 5), the national survey of 29 PFAS and lithium in public drinking water. The final file holds 1,992,002 results from 10,313 water systems, with samples collected from January 2023 to June 2026.
A clearer perspective.The details that matter
What this means.
- The final release replaces the partial files EPA published while sampling was under way, so totals on this site now come from the complete survey.
- Each state summary below counts the systems surveyed, the systems that found PFAS, and those whose PFOA or PFOS yearly average reached EPA’s 4.0 ppt limit, compared the way EPA does.
- A water system that was not in the survey has no result; that is not the same as having no PFAS.
The context. UCMR 5 is a one-time monitoring survey. A result at or above a limit is a measurement, not a violation: the PFOA and PFOS limits are enforced on running annual averages from 2029, and EPA has proposed letting eligible systems request more time, to 2031.
Connect it to your water.
Find your water system, then compare its results with the reference shown next to each number.
Read UCMR 5 results step by stepPFAS results by state.
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Guam
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Puerto Rico
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Keep exploring
More from the water briefing.
Two PFAS proposals address compliance timing and other standards
Both are identified as proposals in the EPA pages reviewed. An extension would require a request and approval; it is not an automatic deadline change for every utility. Their public comment periods closed July 20, 2026.
EPA launches a broader search for drinking-water contaminants
This is a study announcement. It does not report a finding about your local water supply or establish a new drinking-water limit.