EPA releases guidance on PFAS NPDWR sampling and analysis best practices

EPA published a technical guidance document for the PFAS National Primary Drinking Water Regulation (NPDWR) describing requirements and best practices for collection and analysis of drinking water samples for regulated PFAS. The document covers approved methods and practical considerations (e.g., sample handling and quality controls) that can affect compliance monitoring results. Drinking water compliance teams and laboratories can use this to align sampling plans and QA/QC procedures with EPA expectations.