Where It Comes From
Fluoropolymer production; stain-, water-, and grease‑resistant coatings; legacy firefighting foams; breakdown of fluorotelomer chemicals to long‑chain acids like PFDoA [1][2].
How You Are Exposed
Contaminated drinking water, food (especially fish/game from affected waters), indoor dust/air, treated textiles; higher exposures can occur at fluorochemical workplaces [1][2].
Why It Matters
Long‑chain PFAS persist and bioaccumulate; studies of related PFAS link exposure to higher cholesterol, liver enzyme changes, reduced vaccine response, developmental and thyroid effects; some (e.g., PFOA) are carcinogenic. Data for PFDoA are more limited but concerns are similar [1][3][4].
Who Is at Risk
People near fluorochemical plants or firefighting training sites, private‑well users in affected areas, exposed workers, pregnant people and infants, and those who eat a lot of locally caught fish [1][2].
How to Lower Your Exposure
Check local water advisories; test private wells; use certified activated carbon or reverse osmosis filters; follow fish advisories; limit stain‑resistant treatments/grease‑resistant packaging; clean dust with wet methods/HEPA [2][5].
References
- [1]ATSDR. Toxicological Profile for Perfluoroalkyls (PFAS). 2021. https://www.atsdr.cdc.gov/toxprofiles/tp200.pdf
- [2]CDC/ATSDR. PFAS and Your Health. https://www.atsdr.cdc.gov/pfas/
- [3]NTP. Immunotoxicity Associated with Exposure to PFOA or PFOS. 2016. https://ntp.niehs.nih.gov/ntp/ohat/pfoa_pfos/pfoa_pfosmonograph_508.pdf
- [4]IARC. Carcinogenicity of per- and polyfluoroalkyl substances. Press Release No. 269, 2023. https://www.iarc.who.int/news-events/iarc-monographs-evaluate-the-carcinogenicity-of-per-and-polyfluoroalkyl-substances-pfass/
- [5]EPA. PFAS: Understand and Reduce the Risk. https://www.epa.gov/pfas/what-are-pfas and Drinking Water info https://www.epa.gov/pfas/drinking-water-health-advisories-pfoa-and-pfos