National Tribal Water Council
PO Box 15004
Flagstaff, AZ 86011-5004
(480) 452-6774

PFAS Resources

Interactive Map on PFAS Contamination on Tribal Lands
With assistance from the Environmental Working Group, an interactive map was developed to show suspected PFAS contamination near tribal lands:

The Tribal PFAS Working Group would like to thank the Environmental Working Group for their assistance in developing the interactive map. For more information on the Environmental Working Group, please visit:

Consumer Notice’s Information on PFAS Water Contamination and Exposure
Consumer Notice is a trusted source of information on defective products, data breaches, environmental hazards and other threats to human health and safety. Water sources worldwide are increasingly being contaminated with hazardous substances, including per and polyfluoroalkyl substances (PFAS). These harmful chemicals can lead to serious health effects. Here are more information about the dangers of PFAS caused by water contamination through Consumer Notice’s educational resources:

PFAS and Water Contamination:

Health Effects of PFAS Exposure:

Environmental Science & Technology’s Article "Using Geospatial Data and Random Forest to Predict PFAS Contamination in Fish Tissue in the Columbia River Basin, U.S."
On September 5, 2023, the Environmental Science & Technology published an article on the development of a methodology to identify and characterize the extent of PFAS contamination and human exposure. To access the article: Using Geospatial Data and Random Forest To Predict PFAS Contamination in Fish Tissue in the Columbia River Basin, United States

Washington Post’s Article "Lake Superior’s Forever Chemicals"
On January 12, 2022, the Washington Post published an article on the contamination of fish in Lake Superior and how it is affecting Indigenous tribes and their subsistence. To access the article, please visit:

EPA Announces First Validated Laboratory Method to Test for PFAS in Wastewater, Surface Water, Groundwater, Soils
The EPA, in collaboration with the U.S. Department of Defense (DoD), published a draft of the first EPA-validated laboratory analytical method to test for per- and polyfluoroalkyl substances (PFAS) in eight different environmental media, including wastewater, surface water, groundwater, and soils. This method provides certainty and consistency and advances PFAS monitoring that is essential to protecting public health. This draft method can be used in various applications, including National Pollutant Discharge Elimination System (NPDES) permits.

For more information on CWA Analytical Methods for PFAS, visit:

For Frequent Questions about PFAS Methods for NPDES Permits, visit: