Is there PFAS in South Bend Water Works water?
Yes. EPA's final UCMR 5 results show South Bend Water Works averaged 15.8 ppt of PFHxS at its worst sampling point, 1.6 times the EPA limit of 10 ppt.
South Bend Water Works
Serves 115,000 people · 18 PFOA samples from 9 sampling points · Oct 2023 to May 2024
Average above an EPA limit
PFOA Perfluorooctanoic acid
5.0 ppt avg · max 10.0
PFOS Perfluorooctanesulfonic acid
not detected
PFHxS Perfluorohexanesulfonic acid
15.8 ppt avg · max 25.6
Hazard index GenX, PFBS, PFNA, PFHxS combined
1.6 avg · max 2.6
Also detected, no federal limit: PFPeA, PFBA, PFHxA, PFBS, PFHpA, PFPeS.
South Bend Water Works is a public water system drawing on groundwater, based in South Bend, Indiana, serving about 115,000 people, including Granger, Mishawaka, New Carlisle, North Liberty, Notre Dame, South Bend. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 18 times across 9 sampling points between Oct 2023 and May 2024.
Every PFAS detected
Not detected: PFHpS, NFDHA, PFEESA, NMeFOSAA, NEtFOSAA, PFTA, PFTrDA, 6:2 FTS, 4:2 FTS, ADONA, PFMPA, PFMBA, HFPO-DA, PFOS, 8:2 FTS, PFNA, 9Cl-PF3ONS, PFDA, PFDoA, PFUnA, 11Cl-PF3OUdS.
Lithium, tested in the same program: not detected.
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 Indiana
All 230 tested systems in Indiana
ZIP codes served
46530 46544 46552 46554 46556 46601 46613 46614 46615 46616 46617 46619 46624 46628 46634 46635 46637 46660 46680
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 South Bend Water Works water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID IN5271014. https://wellandtap.com/pfas/indiana/south-bend-water-works/
About this data
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID IN5271014). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
