Draft National Recommended Ambient Water Quality Criteria for the Protection of Human Health for Perfluorooctanoic Acid, Perfluorooctane Sulfonic Acid, and Perfluorobutane Sulfonic Acid

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The Environmental Protection Agency (EPA) is announcing the availability of draft Clean Water Act (CWA) national recommended ambient water quality criteria (AWQC) for the protection of human health for three per- and polyfluoroalkyl substances (PFAS)-- perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), and perfluorobutane sulfonic acid (PFBS)--for a 60-day public comment period. The EPA has developed these draft PFAS national recommended human health criteria (HHC) to reflect the latest scientific information, consistent with current EPA guidance, methods, and longstanding practice. When PFAS national recommended HHC are finalized, they will provide information that States and Tribes may consider when adopting water quality standards.