No PFAS were detected in any of the 2 samples EPA's program collected.
Highland County Water Company, INC. is a public water system drawing on groundwater, based in Hillsboro, Ohio, serving about 28,421 people, including Blanchester, Fayetteville, Greenfield, Highland, Hillsboro, Lynchburg. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 2 times across 1 sampling point between Jan 2024 and Jul 2024.
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: PFDoA, PFMBA, PFEESA, NFDHA, PFPeS, PFHpS, PFDA, PFHxA, PFUnA, 11Cl-PF3OUdS, 9Cl-PF3ONS, ADONA, HFPO-DA, PFOA, PFMPA, PFTA, PFTrDA, NEtFOSAA, NMeFOSAA, PFBA, 6:2 FTS, PFOS, 8:2 FTS, PFPeA, PFHpA, PFHxS, PFNA, PFBS, 4:2 FTS.
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 347 tested systems in Ohio
45107 45118 45123 45132 45133 45142 45146 45148 45154 45155 45159 45171 45172 45612 45624 45646 45660 45679 45697
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Well & Tap. "PFAS in Highland County Water Company, INC. water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID OH3600514. https://wellandtap.com/pfas/ohio/highland-county-water-company-inc/
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID OH3600514). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
