The Biden administration’s rule set standards for two common types of PFAS at 4 parts per trillion, effectively the lowest level at which they can be reliably detected. Standards for several other PFAS chemicals were set, too, and utilities must meet those levels by 2029.

Key takeaways - New EPA rule sets strict enforceable limits on six PFAS chemicals, including 4 ppt for PFOA and PFOS - Public water systems have five

Birnbaum expressed similar concerns about the mention of compliance issues, as well as the EPA’s reference to reporting rules under the Toxic Substances Control Act. The announcement emphasized not “overburdening” small businesses and companies importing chemical substances into the U.S, which she said could signal further exemptions and delays.