National Drinking Water Standard for PFAS

The United States Environmental Protection Agency (EPA) issued the first-ever national, legally enforceable drinking water standard to protect communities from exposure to harmful per-and polyfluoroalkyl substances (PFAS), also known as ‘forever chemicals.’

Association of State and Territorial Solid Waste Management Officials Press Release on the National Drinking Water Standards for PFAS

ASTSWMO is pleased that the U.S. Environmental Protection Agency (EPA) has finalized the per- and polyfluoroalkyl substances (PFAS) National Primary Drinking Water Regulation (NPDWR). State and Territorial waste programs understand that as the new federal standards are adopted and implemented by States and Territories there will be significant challenges to our partners in the drinking water program. ASTSWMO emphasizes the need for our drinking water and land programs to work hand-in hand as these standards will have implications not only for our cleanup stakeholders but our State waste response programs.

Risk Management Methodology (RMM) State-EPA Training

ASTSWMO-EPA Webinar on conducting baseline risk assessments on munitions response sites using the Department of Defense’s Risk Management Methodology (RMM). During this training State and EPA regulators will review the unique challenges of munitions response, examine the RMM model framework, and present case studies on RMM implementation.

ASTSWMO Statement on EPA’s Proposal for PFAS National Primary Drinking Water Regulation

ASTSWMO looks forward to working with EPA and our State Association partners on the proposed PFAS National Drinking Water Regulation. The proposed Maximum Contaminant Levels (MCL) of 4 parts per trillion (ppt) for PFOA and 4 ppt for PFOS, in addition to EPA’s proposal to address four additional PFAS (GenX, PFBS, PFNA, and PFHxS) as a mixture using a Hazard Index of 1, also impacts the cleanup work conducted under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and the Resource Conservation and Recovery Act (RCRA). EPA Proposal Summary: On March 14, 2023, EPA announced the proposed National Primary Drinking Water Regulation (NPDWR) for six PFAS including perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), perfluorononanoic acid (PFNA), hexafluoropropylene oxide dimer acid (HFPO-DA, commonly known as GenX Chemicals), perfluorohexane sulfonic acid (PFHxS), and perfluorobutane sulfonic acid (PFBS). The proposed PFAS NPDWR does not require any actions until it is finalized. EPA anticipates finalizing the regulation by the end of 2023. EPA is requesting public comment on the proposed regulation. The public comment period will open following the proposed rule publishing in the Federal Register. Public comments can be provided at that time at under Docket ID: EPA-HQ-OW-2022-0114. EPA will be holding two informational webinars about the proposed PFAS NDPWR on March 16, 2023, and March 29, 2023. The webinars will be similar, with each intended for specific audiences. Registration is required to attend. The webinar recordings and presentation materials will be made available following the webinars. For more information on the proposed regulation, submitting comments, and registering for the webinars visit: For information on ASTSWMO’s activities re: PFAS, visit: