US finally set for nationwide regulation of PFAS in drinking water
The US Environmental Protection Agency (EPA) has proposed the first-ever nationwide drinking water standards in America for six members of a controversial class of chemicals known as per- and polyfluoroalkyl substances (PFAS). The agency anticipates finalising the regulation by the end of the year.
PFAS chemicals have unique properties that confer oil, grease and water repellence as well as resistance to high temperatures, which have led them to be used in the production of household items like non-stick cookware, raincoats, as well as in furniture as fabric protectors. But they do not degrade in the environment, are highly mobile and bioaccumulate.
The EPA will set limits for six PFAS, including perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), which are two of the best known and studied of the estimated 12,000 PFAS compounds out there. They have been linked to health problems like high cholesterol, liver damage, immune system impairment, as well as fertility problems and cancer.
Chemistry World, 17-03-23