USGS PFAS in U.S. Tapwater Study
USGS nationwide study measuring 32 per- and polyfluoroalkyl substances (PFAS) in tapwater from public and private supplies across the United States, with open sample-level concentration data, detection frequencies, and exposure estimates.
usgs.gov
At a glance
- Region
- United States (North America)
- Coverage
- National (public + private supplies)
- Access
- Free
- Category
- Government
What's inside
- PFAS
- Drinking Water Quality
- Contaminants
- Private Wells
What you can do with it
Typical work that data of this type supports.
- 01
Hotspots and trends
Find where contamination is high and whether it is getting worse.
Because it has: Drinking Water Quality
- 02
Compliance checks
Compare samples against drinking water and discharge standards.
- 03
Trend hotspots
Find where water tables are falling year after year.
Because it has: Private Wells
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Risk maps
Predict contamination where no samples exist, from geology, land use and climate.
- 02
Anomaly alerts
Catch sudden spikes in sensor or lab data automatically.
- 03
Gap filling
Rebuild missing well readings from neighbours, rainfall and season.
Related water data
- EWG Tap Water Database (2025 Edition)North America | Free
- Minnesota Department of Health PFAS DashboardNorth America | Free
- California Division of Drinking Water PFAS DataNorth America | Free
- Michigan PFAS Action Response Team (MPART) DataNorth America | Free
- EPA UCMR 5 PFAS Drinking Water DataNorth America | Free
- EWG Arsenic, Nitrate & Chromium-6 Co-occurrence MapNorth America | Free
Find more water data
Search and compare 1,900+ water data sources by region, type and access.