EPA publishes implementation materials for PFAS National Primary Drinking Water Regulation (NPDWR)

EPA published implementation support materials for the PFAS National Primary Drinking Water Regulation (NPDWR), including a technical document on requirements and best practices for PFAS drinking water sample collection and analysis. This guidance is relevant for public water systems, laboratories, and state primacy agencies supporting monitoring and compliance activities under the NPDWR, and should be incorporated into sampling plans, chain-of-custody procedures, and laboratory method selection/QA controls.