EPA provides sampling and analysis best-practices fact sheet for PFAS NPDWR compliance monitoring

EPA published a technical fact sheet on “Requirements and Best Practices for the Collection and Analysis of Samples for the PFAS National Primary Drinking Water Regulation,” intended to support regulated drinking-water systems and primacy agencies in implementing PFAS monitoring under the NPDWR. For compliance teams, this is an authoritative reference for sampling/handling and analytical expectations (e.g., minimizing contamination, QA/QC practices) that can affect compliance monitoring results and defensibility of data.