PFOS/PFOA has been used rigorously in so many products for 70ish years. It really is in everything. I work in environmental consulting and when we sample for it I need to make sure staff don't shower the day before as a lot of shampoos/body washes have PFOS/PFOA in it, you can't wear waterproof jackets, the list goes on. The fact is it's bioaccumulating in fish (along with many persistent pollutants) which makes sense as rivers/streams/oceans is where our waste ends up. Even though I live on the west coast of Canada, far from where the study was conducted, even if the fish here have a fraction of the amount of PFOS/PFOA that is still way past the lifetime limit according to the EPA.

But really if it's not this contaminant in fish it's something else I suppose. Depressing but is anything really clean anymore?

This is incredible. A recent study I read found extremely high levels of PFOS/PFOA in lake and river fish through out the US. Here are a few tidbits from that study: -Consuming 1 fish is the equivalent to drinking water that is 12,000x the safe limit for PFOS for a month straight -The average fish fillet was found to contain 11,800 ng/kg PFOS from the great lakes, the lifetime safe limit is 0.004 ng/kg. That's 2,950,000x the safe lifetime limit for the consumption of one fish.

https://www.sciencedirect.com/science/article/pii/S0013935122024926?via%3Dihub

This is something that needs immediate attention and had me staying away from fish. One thing to note is the study did collect most samples from bass close to larger populations, but still the results are alarming.

From my reading of the study the magnetic fluorinated polymer sorbent would only coat the fluorinated compounds which are not naturally occurring. Likely some of the magnetic solution would stay in the water but you'd much rather have that then PFAS/PFOA