Partner Stephanie Feingold and associate Drew Cleary Jordan discuss a US Environmental Protection Agency (EPA) proposed rule for the first enforceable national drinking water standards for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) in this Law360 Expert Analysis. Per their analysis, if finalized, the rule will be the first national primary drinking water regulation, or NPDWR, under the Safe Drinking Water Act in decades. Published in the Federal Register on March 29, 2023, the landmark proposed rule seeks to regulate these PFAS chemicals at the lowest feasible and technically achievable levels possible. Stephanie and Drew highlight some of the broad and complex rule’s far-reaching implications.