The number of U.S. communities confirmed to be contaminated with the highly toxic fluorinated compounds known as PFAS continues to grow at an alarming rate. As of August 2023 and the latest data shows 3,186 locations in 50 states, the District of Columbia and two territories are known to be contaminated.
The latest update of this interactive map shows PFAS pollution in public and private water systems. Details about our sources and methodology are here.
Information about sites newly added to the map comes from various PFAS detections reported to the EPA under UCMR 5, which requires monitoring of public water systems for 29 PFAS between 2023 and 2025. More data will be released on a rolling basis over the next two years.