Where It Comes From
Releases from fluorochemical manufacturing and processing; persistent in air, water, and sediments; detected in rivers and drinking water [1][2].
How You Are Exposed
Mainly by drinking contaminated water; also by eating locally caught fish or living near plants or downstream of wastewater discharges [2][4].
Why It Matters
Animal studies show liver, kidney, immune, and developmental effects; EPA’s health advisory is 10 parts per trillion, and HFPO‑DA is included in EPA’s new PFAS drinking water rule [1][2][3].
Who Is at Risk
People using private wells near fluorochemical facilities; workers; pregnant people, infants, and children; subsistence fishers [1][3][4].
How to Lower Your Exposure
Test well water; follow fish and water advisories; use home filters certified to reduce PFAS (NSF/ANSI 53 or 58), especially reverse osmosis or activated carbon; consider alternative water sources if levels exceed guidance [2][5].
References
- [1]U.S. EPA. 2021. Human Health Toxicity Values for HFPO‑DA (GenX chemicals). EPA/600/R‑21/005.
- [2]U.S. EPA. 2022. Interim Updated Drinking Water Health Advisory: GenX Chemicals (HFPO‑DA).
- [3]U.S. EPA. 2024. PFAS National Primary Drinking Water Regulation (Final Rule).
- [4]ATSDR. 2021. Toxicological Profile for Perfluoroalkyls (includes GenX chemicals).
- [5]U.S. EPA. 2023. Reducing PFAS in Drinking Water with Home Treatment.