Is there PFAS in Citizens Water - Indianapolis water?
Yes, at low levels. 4 PFAS were detected, all below EPA's 2024 limits.
Citizens Water - Indianapolis
Serves 880,345 people · 26 PFOA samples from 9 sampling points · Aug 2023 to Aug 2024
PFAS found, below EPA limits
PFOA Perfluorooctanoic acid
not detected
PFOS Perfluorooctanesulfonic acid
not detected
Hazard index GenX, PFBS, PFNA, PFHxS combined
not detected
Also detected, no federal limit: PFPeA, PFBA, PFHxA, PFBS.
Citizens Water - Indianapolis is a public water system drawing on surface water, based in Indianapolis, Indiana, serving about 880,345 people, including Carmel, Fishers, Fortville, Mccordsville, Noblesville, Zionsville. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 26 times across 9 sampling points between Aug 2023 and Aug 2024.
Every PFAS detected
Not detected: PFTA, PFEESA, PFMBA, PFMPA, HFPO-DA, PFDoA, PFDA, PFHxS, PFHpA, NFDHA, PFUnA, 4:2 FTS, 6:2 FTS, 9Cl-PF3ONS, PFTrDA, NEtFOSAA, NMeFOSAA, 11Cl-PF3OUdS, ADONA, 8:2 FTS, PFHpS, PFPeS, PFOA, PFOS, PFNA.
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
Levels here are under EPA's limits, so no treatment is required. If you want them lower anyway, a certified reverse osmosis system under the sink handles drinking water, and a whole-house carbon filter also takes out the chlorine or chloramine your utility adds.
Other systems in Indiana
All 230 tested systems in Indiana
ZIP codes served
46032 46037 46038 46040 46055 46062 46077 46107 46112 46113 46123 46140 46143 46163 46183 46201 46202 46203 46204 46205 46206 46208 46214 46216 46217 46218 46219 46220 46221 46222 46224 46225 46226 46227 46228 46229 46231 46234 46235 46236 46237 46239 46240 46241 46249 46250 46251 46254 46256 46259 46260 46268 46278 46282 46285
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 Citizens Water - Indianapolis water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID IN5249004. https://wellandtap.com/pfas/indiana/citizens-water-indianapolis/
About this data
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID IN5249004). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
