Have we stopped the global production of PFAS? It is non-biogradable and thus cumulative in the environment and due to earth's natural hydrological cycle, it doesn't respect borders.
Filtering our drinking water while not banning it entirely and leading the charge to a global ban is just whistling past the graveyard.
"He who eats babies" may shut the fuck up, and go back to chairing the International Society of Aspiring Fascist Dictatorships.