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Is there PFAS in City of Mccomb water?

No PFAS were detected in any of the 2 samples EPA's program collected.

City of Mccomb Serves 12,041 people · 2 PFOA samples from 1 sampling point · May 2024 to Oct 2024 No PFAS detected
PFOA Perfluorooctanoic acid not detected
EPA 4
PFOS Perfluorooctanesulfonic acid not detected
EPA 4
Averages are for the worst sampling point, with non-detects counted as zero. Source: EPA UCMR 5.

City of Mccomb is a public water system drawing on groundwater, based in Mccomb, Mississippi, serving about 12,041 people. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 2 times across 1 sampling point between May 2024 and Oct 2024.

Every PFAS detected

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: NFDHA, PFEESA, PFMBA, PFPeA, PFMPA, 8:2 FTS, 4:2 FTS, PFBA, NEtFOSAA, NMeFOSAA, PFHpS, 11Cl-PF3OUdS, PFTrDA, 6:2 FTS, PFHpA, PFHxS, PFNA, PFOS, PFOA, PFDA, PFDoA, PFUnA, 9Cl-PF3ONS, ADONA, HFPO-DA, PFTA, PFPeS, PFHxA, PFBS.

Lithium, tested in the same program: highest 14.2 ppb, detected in 2 of 2 samples. EPA's health-based screening level is 10 ppb.

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

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.

Other systems in Mississippi

All 239 tested systems in Mississippi

Cite this page

Well & Tap. "PFAS in City of Mccomb water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID MS0570004. https://wellandtap.com/pfas/mississippi/city-of-mccomb/

About this data

Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID MS0570004). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.