Actually, they set a limit for drinking water. The limit is 4.0 parts per trillion. That is also the instrument detection limit, meaning essentially zero. Drinking water facilities do not add PFAS chemicals to the water. But they are responsible for removing it. At an extremely large cost. The cost will of course be passed onto the consumer. PFAS are suspected carcinogens, but nothing more definitive. In my opinion, the greatest health effect is a correlation to PFAS concentration and reduced in birth weight. PFAS manufacturing is no longer occurring in the US. It's uses are now extremely limited, except in small concentrations where no other chemical can be substituted. As a result, the EPA has reduced PFOS from 30 ng/L in the average citizen's bloodstream to about 5 ng/L since 2000. So it is in decline. PFAS is still being manufactured in China, as can be imagined. Most of the products containing PFAS, which are many, are also still being manufactured there. There is no easy solution to eliminating every last trace of PFAS chemicals, since it is everywhere. Even the removal is a problem, as the EPA has realized the issue with disposing of the spent carbon resins. While I don't want any of these chemicals in my body (it takes about 4 years to eliminate half the concentration of PFAS in ones body) I'm not so sure of the EPA's recent response But don't get me started on the issue.