Washington enacts biosolids PFAS sampling requirements under SB 5033

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

• Official PFAS in biosolids sampling law - Washington State Department of Ecology
• PFAS in Biosolids: Washington State Adopts Testing Requirement

Key Findings

Washington enacts biosolids PFAS sampling requirements under SB 5033