EPA proposed to approve revisions to Louisiana's Underground Injection Control Program that would allow permits for and ensure compliance of geologic carbon sequestration facilities as Class VI wells for primacy under the SDWA.

EPA proposed a national primary drinking water regulation and health-based maximum contaminant level goals for perfluorohexane sulfonic acid (PFHxS), hexafluoropropylene oxide dimer acid (HFPO-DA) and its ammonium salt (also known as a GenX chemicals), perfluorononanoic acid (PFNA), and perfluorobutane sulfonic acid (PFBS), and their mixtures, as well as for perfluorooctanoic acid and perfluorooctane sulfonic acid under the SDWA.

EPA approved revisions to Nevada's state primacy program under the SDWA that adopted regulations that effectuate the federal Radionuclides Rule.

EPA approved revisions to Arizona's state primacy program under the SDWA that adopted regulations that effectuate the federal Revised Total Coliform Rule.