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On March 29, 2023, the U.S. EPA published the proposed PFAS Drinking Water Regulations in the Federal Register. This proposed rule for Per- and Polyfluoroalkyl Substances (PFAS) includes Maximum Contaminant Levels (MCLs) of 4.0 ng/L for two PFAS constituents (PFOA and PFOS), and an MCL using a Hazard Index of 1.0 for 4 other PFAS constituents. In the upcoming webinar, we will discuss some background information on PFAS, the proposed rulemaking efforts, and the impact of this rulemaking.