Where It Comes From
Fluoropolymer manufacturing and water/oil‑repellent coatings; breakdown of fluorotelomer PFAS into long‑chain perfluorocarboxylic acids like PFTDA [1][2].
How You Are Exposed
Drinking water near PFAS‑using factories or firefighting sites; eating contaminated fish/foods; indoor dust; treated textiles/packaging; workplace exposure [1][2].
Why It Matters
Data on PFTDA are limited, but long‑chain PFAS have been linked to higher cholesterol, liver and immune effects, and developmental impacts; PFOA (a related PFAS) is carcinogenic to humans [1][3][4].
Who Is at Risk
Communities with PFAS‑contaminated water, PFAS‑industry workers, pregnant people, infants/children, and frequent consumers of local fish/wildlife [1][2].
How to Lower Your Exposure
Check local water results; use certified activated carbon or reverse osmosis filters for PFAS; follow fish advisories; limit stain/water‑resistant products; wet‑dust/HEPA vacuum; follow workplace protections [2][5].
References
- [1]ATSDR. Toxicological Profile for Perfluoroalkyls (PFAS). 2021.
- [2]U.S. EPA. Basic Information on PFAS (exposure, persistence, reducing risk). 2023–2024.
- [3]NTP. Immunotoxicity of PFOA and PFOS. 2016.
- [4]IARC. PFOA carcinogenic to humans; PFOS possibly carcinogenic. Press Release No. 264, 2023.
- [5]CDC/ATSDR. PFAS and Your Health – Reducing Exposure (water filters, fish advisories).