No PFAS were detected in any of the 84 samples EPA's program collected.
Baton Rouge Water Company is a public water system drawing on groundwater, based in Baton Rouge, Louisiana, serving about 596,844 people, including Gonzales, Baker, Brittany, Darrow, Duplessis, Geismar. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 84 times across 42 sampling points between Mar 2024 and May 2026.
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, NEtFOSAA, PFTrDA, PFTA, PFHxA, PFDA, PFUnA, PFHpA, PFBS, PFOS, PFNA, PFDoA, 8:2 FTS, PFOA, PFPeS, NFDHA, PFEESA, PFMBA, NMeFOSAA, PFMPA, PFHpS, 4:2 FTS, 6:2 FTS, PFBA, HFPO-DA, ADONA, 9Cl-PF3ONS, 11Cl-PF3OUdS, PFPeA.
Lithium, tested in the same program: highest 45.6 ppb, detected in 72 of 84 samples. EPA's health-based screening level is 10 ppb.
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 268 tested systems in Louisiana
70707 70714 70718 70725 70728 70734 70737 70739 70769 70770 70774 70776 70777 70778 70791 70801 70802 70803 70804 70805 70806 70807 70808 70809 70810 70811 70812 70813 70814 70815 70816 70817 70818 70819 70820 70821 70825 70826 70827 70835 70836 70879 70894 70895 70896 70898
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Well & Tap. "PFAS in Baton Rouge Water Company water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID LA1033005. https://wellandtap.com/pfas/louisiana/baton-rouge-water-company/
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID LA1033005). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
