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Illinois EPA issues health advisory for 6:2 fluorotelomer sulfonic acid (6:2 FTS)
PFAS IllinoisIllinois Environmental Protection AgencyIllinois
Announced
Nov 24, 2025
Description
On November 24, 2025, the Illinois Environmental Protection Agency issued a health advisory for 6:2 fluorotelomer sulfonic acid (6:2 FTS), CASRN 27619-97-2. This PFAS substance was designed as a replacement for PFOS in fire-fighting foam and other uses. The health advisory provides guidance on potential adverse health effects and is part of Illinois EPA's ongoing PFAS monitoring program. Community water supplies should be aware of this advisory when testing for PFAS contamination. The statewide PFAS investigation has detected 6:2 FTS in some community water supply groundwater.
Sources
Key Findings
Illinois EPA issues health advisory for 6:2 fluorotelomer sulfonic acid (6:2 FTS)
November 24, 2025 Kim Biggs, Illinois EPA FOR IMMEDIATE RELEASE 217-558-1536 kim.biggs@illinois.gov Illinois EPA Issues Health Advisory for 6:2 Fluorotelomer Sulfonic Acid Chemical Identified Through Per- and Polyfluoroalkyl Substances (PFAS) Sampling of Community Water Supplies Springfield – Illinois Environmental Protection Agency Acting Director James Jennings announced the issuance of a health advisory for the PF
Illinois EPA issues health advisory for 6:2 fluorotelomer sulfonic acid (6:2 FTS)
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