Illinois — PFOS
For Illinois, state–chemical pair is Illinois — PFOS; pfas compound is PFOS; concentration limit (ppt) is 4; regulation type is guideline; stricter than federal mcl is no, recorded from its source on 2026-08-14.
- State–chemical pair
- Illinois — PFOS
- State
- Illinois verified
- PFAS compound
- PFOS verified
- Concentration limit (ppt)
- 4 verified
- Regulation type
- guideline
- Stricter than federal MCL
- no our reading
- Regulatory citation
- 35 IAC Part 620
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
Concentration level 4 ppt (stated by the Illinois Environmental Pollution Control Agency as 4 ng/L) Chemical(s) and type of regulation PFOS (Guidance)
— bclplaw.com, retrieved 2026-08-14
Source
- bclplaw.comhttps://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html