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Illinois EPA confirms state PFAS drinking water standards remain in effect despite federal rollback
35 Illinois Administrative Code Part 620 (Groundwater Quality)Illinois Environmental Protection AgencyIllinois
Announced
May 21, 2026
Description
Illinois EPA issued an official statement confirming the state will maintain its PFAS drinking water standards despite the Trump Administration's rollback of federal PFAS regulations. Illinois' Maximum Contaminant Levels (MCLs) for six PFAS compounds (PFOA: 4 ppt, PFOS: 4 ppt, PFHxS: 10 ppt, PFNA: 20 ppt, PFBS: 2,100 ppt, and GenX) remain in effect. The statement confirms Illinois Community Water Supplies must complete initial monitoring by April 25, 2027, begin ongoing compliance monitoring on April 26, 2027, and achieve MCL compliance by April 26, 2029.
Sources
Key Findings
Illinois EPA confirms state PFAS drinking water standards remain in effect despite federal rollback
May 21, 2026 Kim Biggs, Illinois EPA FOR IMMEDIATE RELEASE 217-558-1536 kim.biggs@illinois.gov Illinois EPA Issues Statement on Trump Administration’s Rollback of PFAS Requirements for Drinking Water State Drinking Water Standards Remain in Place for PFAS Springfield – Illinois Environmental Protection Agency’s (Illinois EPA) Director James Jennings issued a statement following the U.S. EPA’s announcement to roll bac