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Illinois EPA reaffirms PFAS drinking water standards will remain in effect
35 Illinois Administrative Code Part 620 (Groundwater Quality)Illinois Environmental Protection AgencyIllinois
Announced
May 21, 2026
Description
Illinois EPA Director James Jennings issued a formal statement confirming that Illinois will maintain its state-specific PFAS drinking water standards despite federal EPA's proposed rollback of four PFAS MCLs. Illinois groundwater standards for HFPO-DA (GenX), PFBS, PFHxS, PFNA, PFOA, and PFOS remain in effect. Community water supplies must still comply with state initial monitoring deadlines (April 25, 2027) and MCL compliance requirements (April 26, 2029).
Sources
Key Findings
Illinois EPA reaffirms PFAS drinking water standards will remain in effect
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
Illinois EPA reaffirms PFAS drinking water standards will remain in effect
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