The USEPA released a PFAS Strategic Roadmap in October 2021, which anticipates federal regulation of PFAS in drinking water. This includes issuing formal regulatory limits for PFOA and PFOS in about a year and ongoing assessment of other PFAS compounds for potential future regulation. Additionally in the spring of 2021, the USEPA announced the Fifth Uncontaminated Monitoring Rule (UCMR5) compound list which includes 29 PFAS compounds. Monitoring for UCMR5 will begin in 2023. EPA uses the Unregulated Contaminant Monitoring Rule (UCMR5) to collect data for contaminants that are suspected to be present in drinking water and do not have health-based standards set under the Safe Drinking Water Act (SDWA)
There is another testing method (USEPA Method 533) that can detect 25 PFAS compounds in the approved analyte list, but it is not currently approved by MassDEP for public drinking water supply testing. A combination of USEPA Method 533 and 537.1 will be used for UCMR5 analyte list.