PFAS in Drinking Water — EPA 537.1 / 533
EPA Methods 533 and 537.1 use LC-MS/MS for defined PFAS targets in drinking water; neither measures every PFAS or substitutes automatically for non-potable-water/soil methods.
Request method-specific analytes and reporting limits, blanks and contamination controls. Follow the laboratory's PFAS collection kit instructions and identify whether the sample is before or after treatment.
Total fluorine screening and targeted PFAS concentrations answer different questions. Confirm applicable jurisdiction/programme requirements with the laboratory; no current edition or treatment guarantee is implied.