No PFAS were detected in any of the 8 samples EPA's program collected.
Central Arkansas Water is a public water system drawing on surface water, based in Little Rock, Arkansas, serving about 368,455 people, including Alexander, Bigelow, College Station, Hensley, Houston, Jacksonville. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 8 times across 2 sampling points between Dec 2024 and Sep 2025.
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: HFPO-DA, PFMPA, PFUnA, 11Cl-PF3OUdS, 9Cl-PF3ONS, ADONA, PFOS, 6:2 FTS, 4:2 FTS, PFDoA, 8:2 FTS, PFDA, NMeFOSAA, NEtFOSAA, PFTrDA, PFTA, PFHpS, PFPeS, NFDHA, PFEESA, PFMBA, PFPeA, PFOA, PFNA, PFHxS, PFHpA, PFBS, PFBA, 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 172 tested systems in Arkansas
72002 72016 72053 72065 72070 72076 72086 72099 72103 72106 72113 72114 72116 72117 72118 72120 72122 72126 72135 72142 72183 72201 72202 72204 72205 72206 72207 72209 72210 72211 72212 72223 72227
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Well & Tap. "PFAS in Central Arkansas Water water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID AR0000465. https://wellandtap.com/pfas/arkansas/central-arkansas-water/
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID AR0000465). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
