I never asserted as much. HF was for reference and the comment on bottled water a segue re discussion of water filtration in general because, imho, anyone concerned about PFAS should share concern about HF.
However, if HF is present in bottled water, so are PFAS, as demonstrated by testing:
Some Bottled Water Brands Have Concerning PFAS Levels, Massachusetts Regulator Warns
If PFAS are present in bottled water following 'purification' (filtered tap water), then they are also present in any post filtration result of household water filters. Ironically, the linked test results and brands list no longer exist (even in archives). Go figure. /s
Note: There have been over 4000 PFAS/PFOS produced/used since the 1940s and, as the so-called 'study' demonstrates (somewhat uselessly), they do affect human health.
A general search will reveal that there are many papers/articles discussing filtration strategies for public water systems (as I linked), including strategies to break the carbon bonds to break down the substances; none of it is cheap and neither fully effective (yet). Due to the molecular weight of PFAS, they follow water columns and may descend into aquifers. To meet the marketing strategies of the manufacturers, we have poisoned ourselves. These substances should be evaluated for serious consideration of removal from use. Globally.
yes
Have you looked into the effects of ozone or reverse osmosis on water with teflon residues? I think ozone disintegrates plastic.