Source: https://www.goldbergsegalla.com/, June 11, 2026
By: Oliver E. Twaddell

As we recently reported here and here, the Environmental Protection Agency has stated it is revisiting and rolling back some of its limits on per- and polyfluoroalkyl substances (PFAS) in drinking water. The prior regulations set by the EPA included the following:

• A Maximum Contaminant Level Goal (MCLG) of zero for PFOA and PFOS.
• Enforceable Maximum Contaminant Levels (MCLs) set at 4.0 parts per trillion for perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), individually.
• For perfluorononanoic acid (PFNA), perfluorohexanesulfonic acid (PFHxS), and GenX chemicals (a nickname given to shorter-chain chemicals used to make high-performance fluoropolymers without PFOA), the MCLGs and MCLs were set at 10 parts per trillion.
• Limits were also set for any mixture containing two or more of the following PFAS: PFNA, PFHxS, perfluorobutanesulfonic acid (PFBS), and GenX chemicals. Read more.