The California State Water Resources Control Board (Water Board) has issued Order WQ 2020-0015-DWQ, requiring Publicly Owned Treatment Works (POTWs) with dry weather design flows greater than 1 million gallons per day to test for per- and polyfluoroalkyl substances (PFAS) in influent, effluent, biosolids, and, in some cases, groundwater. POTWs with existing groundwater monitoring programs may be required to submit initial documentation for compliance as early as August.
The order covers thirty-one PFAS analytes (see table provided here), as well as eleven additional analytes listed for “optional analysis.” All treatment sampling and analysis and groundwater monitoring proposals and analysis must be uploaded to the Water Board’s GeoTracker system, and will be incorporated into the Board’s ongoing PFAS mapping project.