The State of Washington recently adopted regulations setting state action levels (SALs) for PFOA (10 ppt), PFOS (15 ppt), PFHxS (65 ppt), PFNA (9 ppt), and PFBS (345 ppt). Detections over the SALs by affected water systems will trigger monitoring, reporting, and public notification. The rule is effective January 1, 2022.