On March 14, 2023, the U.S. Environmental Protection Agency (EPA) announced that it will propose the first-ever national drinking water standard for six per- and polyfluoroalkyl substances (PFAS) in the latest action under EPA’s PFAS Strategic Roadmap. The proposed National Primary Drinking Water Regulation (NPDWR) would regulate perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) as individual contaminants and will regulate four other PFAS — perfluorononanoic acid (PFNA), perfluorohexane sulfonic acid (PFHxS), perfluorobutane sulfonic acid (PFBS), and hexafluoropropylene oxide dimer acid (GenX chemicals) — as a mixture. Publication of the proposed rule in the Federal Register will begin a 60-day comment period. EPA held an informational webinar on March 16, 2023, and will hold another on March 29, 2023, and a public hearing on May 4, 2023. For more information, please read the full memorandum.
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