No PFAS were detected in any of the 8 samples EPA's program collected.
Milwaukee Waterworks is a public water system drawing on surface water, based in Milwaukee, Wisconsin, serving about 626,000 people, including Hales Corners, Franklin, Milwaukee, Saint Francis. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 8 times across 2 sampling points between Feb 2023 and Nov 2023.
None of the 29 PFAS were found at or above EPA's minimum reporting levels (2 to 20 ppt depending on the compound).
Not detected: PFHxS, ADONA, 9Cl-PF3ONS, 11Cl-PF3OUdS, PFUnA, PFDoA, PFOA, HFPO-DA, PFNA, PFEESA, PFHpA, PFOS, PFMPA, PFBS, PFMBA, PFDA, NFDHA, PFPeS, PFHpS, PFTA, PFTrDA, NEtFOSAA, 4:2 FTS, PFPeA, 8:2 FTS, PFBA, 6:2 FTS, NMeFOSAA, PFHxA.
Lithium, tested in the same program: not detected.
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.
No PFAS action is needed on these results. If your water tastes or smells of chlorine, a whole-house city water filter is the usual fix.
All 202 tested systems in Wisconsin
53130 53132 53201 53202 53203 53204 53205 53206 53207 53208 53209 53210 53211 53212 53213 53214 53215 53216 53217 53218 53219 53220 53221 53222 53223 53224 53225 53226 53227 53228 53233 53234 53235 53237 53259 53263 53274 53278 53288 53290 53293 53295
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Well & Tap. "PFAS in Milwaukee Waterworks water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID WI2410100. https://wellandtap.com/pfas/wisconsin/milwaukee-waterworks/
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID WI2410100). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
