https://www.atsdr.cdc.gov/pfas/health-effects/us-population.html https://www.atsdr.cdc.gov/pfas/health-effects/us-population.... I found this website useful an

https://www.atsdr.cdc.gov/pfas/health-effects/us-population.html https://www.atsdr.cdc.gov/pfas/health-effects/us-population.... I found this website useful and I found this encouraging. >Since 2002, production and use of PFOS and PFOA in the United States have declined. As the use of some PFAS has declined, some blood PFAS levels have gone down as well. >From 1999-2000 to 2017-2018, blood PFOS levels declined by more than 85%. >From 1999-2000 to 2017-2018, blood PFOA levels declined by more than 70%. Of course they may have just switched to other PFAs but it is something. I also found this recommendation useful- >Below 2 nanograms per milliliter: If blood concentration levels fall below 2 nanograms per milliliter, people “are not expected to have adverse health effects,” the committee said. When looking at the charts remember that 2 ng/mL is the same at 2 ug/L, the units used in the graphs.