Is there PFAS in Il American-peoria water?
Yes. EPA's final UCMR 5 results show Il American-peoria averaged 4.1 ppt of PFOS at its worst sampling point, 1.0 times the EPA limit of 4 ppt.
Il American-peoria
Serves 137,575 people · 10 PFOA samples from 4 sampling points · Nov 2023 to Aug 2024
Average above an EPA limit
PFOA Perfluorooctanoic acid
not detected
PFOS Perfluorooctanesulfonic acid
4.1 ppt avg · max 6.5
Hazard index GenX, PFBS, PFNA, PFHxS combined
not detected
Also detected, no federal limit: PFBA, PFPeA, PFHxA, PFBS.
Il American-peoria is a public water system drawing on surface water, based in Godfrey, Illinois, serving about 137,575 people, including Chillicothe, Dunlap, Edelstein, Edwards, Hanna City, Kingston Mines. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 10 times across 4 sampling points between Nov 2023 and Aug 2024.
Every PFAS detected
Not detected: 6:2 FTS, PFHpA, PFHxS, 8:2 FTS, PFNA, NEtFOSAA, PFTrDA, PFTA, PFHpS, PFPeS, NFDHA, PFEESA, PFMBA, HFPO-DA, PFMPA, PFDA, 4:2 FTS, NMeFOSAA, ADONA, 9Cl-PF3ONS, 11Cl-PF3OUdS, PFUnA, PFDoA, PFOA.
Lithium, tested in the same program: highest 20.8 ppb, detected in 9 of 10 samples. EPA's health-based screening level is 10 ppb.
What the EPA limits mean here
In April 2024 EPA set enforceable limits of 4 ppt for PFOA and PFOS, 10 ppt each for PFHxS, PFNA and GenX, and a hazard index of 1 for mixtures. Utilities were given until 2029 to comply. In May 2026 EPA proposed keeping only the PFOA and PFOS limits and moving that deadline to 2031. Until that proposal is final, the 2024 limits stand.
Compliance is judged on a running annual average at each entry point, so we show the average at this system's worst sampling point next to its single highest result. UCMR 5 results do not by themselves put a utility in or out of compliance.
What you can do at home
Two routes work for PFAS. For drinking and cooking water only, a reverse osmosis system certified to NSF/ANSI 58 with a PFOA/PFOS reduction claim is the cheapest proven option. To treat every tap and shower, a whole-house carbon system with enough contact time works, but check that the maker has PFAS test data, not just a marketing claim. See the best filters for PFAS and how PFAS removal works.
Other systems in Illinois
All 487 tested systems in Illinois
ZIP codes served
61523 61525 61526 61528 61536 61539 61547 61552 61601 61602 61603 61604 61605 61606 61607 61612 61613 61614 61615 61616 61625 61629 61630 61633 61634 61636 61637 61638 61639 61641 61643 61650 61651 61652 61653 61654 61655 61656
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Cite this page
Well & Tap. "PFAS in Il American-peoria water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID IL1435030. https://wellandtap.com/pfas/illinois/il-american-peoria/
About this data
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID IL1435030). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
