PFAS

American  

[pee-fas] / ˈpiˌfæs /

noun

1. perfluoroalkyl and polyfluoroalkyl substances: long-lasting chemicals used in cleaning products, cookware coating, fire-fighting foams, makeup, stain-resistant carpeting, etc., that remain in the environment because they break down very slowly, and subsequently accumulate within animals and people: among the substances known as forever chemicals.

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Etymology

Origin of PFAS

First recorded in 1990–95; by shortening

Example Sentences

There is not extensive research on the impacts of all PFAS, but some are proven to be toxic and carcinogenic - increasing the risk of kidney cancer and raising cholesterol.

From BBC • Apr. 22, 2026

“We require all our vendors to regularly conduct testing for restricted substances, including PFAS, by credible third-party agencies to confirm ongoing compliance.”

From Barron's • Apr. 13, 2026

The chemicals, known as PFAS, don’t break down in the environment and accumulate in the body, potentially causing health problems such as cancer and infertility.

From The Wall Street Journal • Apr. 13, 2026

The findings show that babies are exposed before birth to a diverse mix of PFAS, including perfluorinated chemicals, polyfluorinated chemicals, and fluorotelomers.

From Science Daily • Feb. 23, 2026

She said the chemicals leak out from manufacturing, washing our clothes or products with PFAS, as well as from the spread of waste sludge from water treatment works onto agricultural fields.

From BBC • Feb. 2, 2026