Yes, at low levels. 1 PFAS was detected, all below EPA's 2024 limits.
Also detected, no federal limit: PFBA.
Lafourche Water District 1 is a public water system drawing on surface water, based in Lockport, Louisiana, serving about 81,609 people, including Des Allemands, Thibodaux, Bourg, Cut Off, Galliano, Gheens. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 12 times across 3 sampling points between Mar 2024 and Dec 2024.
| PFAS | Detected | Highest | Worst point avg | EPA limit |
|---|---|---|---|---|
| PFBA Perfluorobutanoic acid |
5 of 12 | 6.7 ppt | 3.0 ppt | none |
Not detected: PFHxA, PFDoA, PFDA, PFOA, PFOS, PFNA, PFHxS, PFHpA, NEtFOSAA, NMeFOSAA, PFMPA, PFTA, PFTrDA, PFUnA, PFBS, PFMBA, PFHpS, PFPeS, NFDHA, 4:2 FTS, PFEESA, 11Cl-PF3OUdS, PFPeA, ADONA, 9Cl-PF3ONS, HFPO-DA, 6:2 FTS, 8:2 FTS.
Lithium, tested in the same program: highest 12.5 ppb, detected in 2 of 12 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.
Levels here are under EPA's limits, so no treatment is required. If you want them lower anyway, a certified reverse osmosis system under the sink handles drinking water, and a whole-house carbon filter also takes out the chlorine or chloramine your utility adds.
All 268 tested systems in Louisiana
70030 70301 70343 70345 70354 70355 70357 70359 70364 70373 70374 70375 70394
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Well & Tap. "PFAS in Lafourche Water District 1 water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID LA1057001. https://wellandtap.com/pfas/louisiana/lafourche-water-district-1/
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID LA1057001). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
