Illinois EPA has established specific compliance timelines for the PFAS drinking water Maximum Contaminant Levels (MCLs) under the amended Part 620 groundwater quality regulations. Community water supplies must complete initial monitoring by April 25, 2027, begin ongoing compliance monitoring on April 26, 2027, and achieve compliance with MCLs by April 26, 2029. The standards cover PFOA (4 ppt), PFOS (4 ppt), PFHxS (10 ppt), PFNA (10 ppt), HFPO-DA/GenX (10 ppt), and PFBS (part of Hazard Index mixture).
Illinois EPA Director James Jennings issued an official statement on May 21, 2026 confirming that Illinois will maintain its PFAS drinking water standards regardless of federal regulatory rollbacks. The statement emphasized Illinois' commitment to addressing PFAS pollution and protecting drinking water resources. Illinois has established Maximum Contaminant Levels (MCLs) for six PFAS compounds under its Part 620 groundwater quality regulations, with compliance required by April 26, 2029.
Illinois EPA announced the implementation timeline for PFAS drinking water standards under 35 Illinois Administrative Code Part 620. Community Water Supplies must complete initial monitoring by April 25, 2027; ongoing compliance monitoring begins April 26, 2027; and compliance with Maximum Contaminant Levels (MCLs) begins April 26, 2029. Illinois reaffirmed it will maintain its PFAS drinking water standards regardless of federal EPA changes.
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.
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).
Illinois has enacted new legislation requiring wastewater treatment plants and industrial facilities holding Clean Water Act discharge permits to conduct ongoing monitoring for per- and polyfluoroalkyl substances (PFAS) in wastewater discharges, biosolids, and sewage sludge. The law is intended to identify and control major sources of PFAS contamination entering Illinois waterways and the environment.
The Illinois Environmental Protection Agency (Illinois EPA) has amended its Part 620 Groundwater Quality Regulations to establish state-specific Maximum Contaminant Levels (MCLs) for six per- and polyfluoroalkyl substances (PFAS) in drinking water. The amendments are designed to protect public health by limiting PFAS exposure through drinking water sources and strengthening groundwater quality protections across the state. Under the regulation, community water supplies must conduct monitoring for regulated PFAS compounds and demonstrate compliance with the established MCLs according to the phased implementation schedule.
Illinois Senate Bill 3101, introduced January 29, 2026 by Senator Julie A. Morrison, proposes amendments to the Illinois Environmental Protection Act (415 ILCS 5) to add new sections establishing PFAS regulations. The bill would create Title XIX and sections 60 and 60.1 with requirements for analytical methods, sampling protocols, reporting procedures, and compliance timelines for per- and polyfluoroalkyl substances in water quality.
Illinois EPA notified the Village of Dupo and connected water systems that PFAS compounds were detected in water sampling at levels exceeding the state's newly established groundwater quality standards. This action triggers mandatory Right-to-Know notification requirements under Illinois law, requiring water systems to notify customers within 5 business days. This demonstrates ongoing enforcement of Illinois' state-level PFAS standards independent of federal regulatory actions.
Under the Illinois PFAS Reduction Act (415 ILCS 170/20), sellers of firefighting personal protective clothing containing PFAS must provide written notice to purchasers disclosing that the clothing contains PFAS and the reason PFAS are added, effective January 1, 2026. Sellers and purchasers must retain notice copies for at least 3 years. The sale of PFAS-containing firefighting clothing is prohibited effective January 1, 2027, and auxiliary firefighting equipment containing PFAS is banned effective January 1, 2030.
Illinois EPA issued a new health advisory for 6:2 Fluorotelomer Sulfonic Acid (6:2 FTS), adding this PFAS compound to the state's list of regulated substances. Health advisories provide guidance levels for drinking water concentrations at which no adverse health effects are expected and remain in effect until enforceable groundwater quality standards are established. Illinois now has health advisories for nine PFAS compounds total. Compliance teams should monitor for future transition to enforceable groundwater standards.
Public Act 104-0231 (HB 2516) amends the Illinois PFAS Reduction Act to prohibit the sale, distribution, or offering for sale of certain consumer products containing intentionally added PFAS, effective January 1, 2032. Covered products include cosmetics, dental floss, juvenile products, menstrual products, and intimate apparel. The legislation also requires Illinois EPA to submit a report to the General Assembly by August 1, 2027 assessing the authority and resources needed to develop a fluoropolymer review program for consumer products. Cookware and food packaging were removed from the final bill.