EPA issues guidance and implementation tools for PFAS National Primary Drinking Water Regulation (NPDWR), including sampling/analysis best practices

EPA published PFAS NPDWR implementation support materials and technical guidance relevant to compliance monitoring. This includes a fact sheet on requirements and best practices for collecting and analyzing PFAS drinking-water samples (e.g., sampling handling, contamination precautions, blanks, and lab/analysis expectations). Compliance teams at public water systems, labs, and contractors should align sampling plans, QA/QC procedures, and procurement/specifications with EPA’s stated best practices to reduce invalid samples and ensure defensible compliance monitoring results.