PFAS & Drinking Water

Per- and Polyfluoroalkyl Substances (PFAS) are man-made chemicals that have been used in industry and consumer products worldwide since the 1940s. They have been used to make nonstick cookware, water-repellent clothing, stain-resistant fabrics and carpets, some cosmetics, some firefighting foams, and products that resist grease, water, and oil.

During production and use, PFAS can migrate into the soil, water, and air. Most PFAS (including PFOA and PFOS) do not break down, so they remain in the environment. Because of their widespread use and their persistence in the environment, PFAS are found in the blood of people and animals all over the world and are present at low levels in a variety of food products and in the environment.

Agency for Toxic Substances and Disease Registry (ATSDR) - PFAS chemicals overview | ATSDR (cdc.gov)

PFAS Exposure

• PFAS Exposure and Your Body - Understanding PFAS Exposure and Your Body | Per- and Polyfluoroalkyl Substances (PFAS) and Your Health | ATSDR (cdc.gov)
• Human Health and PFAS - Our Current Understanding of the Human Health and Environmental Risks of PFAS | U.S. EPA

Environmental Protection Agency (EPA) PFAS Regulations

EPA proposed maximum contamination levels (MCLs) of 4 parts per trillion (ppt) for perfluorooctanesulfonate (PFOS) and four parts per trillion (ppt) perfluorooctanoic acid (PFOA).

• 2023 EPA Proposal to Regulate PFAS in Drinking Water (PDF)

Individual Testing

• Blood testing for PFAS | ATSDR (cdc.gov)
• Talking to Your Doctor about Exposure to PFAS | ATSDR (cdc.gov)

Home Testing

• Accredited Labs that Test Public Drinking Water Samples for PFAS (PDF)

Home Treatment

• Home Water Treatment for PFAS - 331-699.pdf (wa.gov) (PDF)
• PFAS Point of Use Filter Options - PFAS Point-Of-Use Filter Options (wa.gov) (PDF)

FAQ & More Info

• PFAS | Washington State Department of Health
• Final PFAS National Primary Drinking Water Regulation
• Per- and Polyfluoroalkyl Substances (PFAS) | U.S. EPA