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Washington enacts biosolids PFAS sampling requirements under SB 5033
Chapter 70A.226 RCW (SB 5033)Washington State Department of EcologyWashington
Announced
May 19, 2025
Implementation
Jul 1, 2026
Description
Washington enacted SB 5033 establishing PFAS sampling and analysis requirements for facilities regulated under the Biosolids General Permit under Chapter 70A.226 RCW. Ecology must publish PFAS biosolids sampling guidance by July 1, 2026. Facilities must sample biosolids using EPA Method 1633A between January 1, 2027 and June 30, 2028, with all sampling results due to Ecology by September 30, 2028. A legislative report is due July 1, 2029.
Sources
Key Findings
Washington enacts biosolids PFAS sampling requirements under SB 5033
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Washington enacts biosolids PFAS sampling requirements under SB 5033
Ballard Spahr Ballard Spahr People About Us Services Insights Offices Careers Legal Alert # PFAS in Biosolids: Washington State Adopts Testing Requirement by Michael A. Nesteroff May 19, 2025 #### Share Washington State has joined the growing list of states addressing the presence of per- and polyfluoroalkyl substances (PFAS), commonly known as “forever chemicals,” in biosolids that are widely used in farming. With G