The company manufacturing Teflon has been disposing of chemicals used during the manufacture of Teflon in such a way that those chemicals end up in the drinking water supply of communities surrounding factories.
https://theintercept.com/2018/02/10/firefighting-foam-afff-p...
Huffington Post article: https://highline.huffingtonpost.com/articles/en/welcome-to-b...
Dark Waters film on the topic: https://www.imdb.com/title/tt9071322/
DuPont was the entity responsible for the pollution and coverup.
If you're concerned about goretex and dwrs, everything made by Nikwax uses different technology and is PFA free. Goretex might be safe for end user (or might not) but the manufacturing process is probably environmentally risky ... I wouldn't buy goretex for non-critical uses. So use it for mountaineering but not in the ski resort or on the way to work