County · Louisiana
Union Parish, Louisiana: drinking water records
This overview covers 7 ZIP codes and 18 community water systems in Union Parish. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Town of Farmerville Water System LA1111005 | 5,352 | 180 | 2 | 42 | 1.3 ppb |
| Darbonne Ws South LA1111023 | 3,261 | 0 | 0 | 23 | 0 ppb |
| Darbonne Ws North LA1111024 | 3,186 | 0 | 0 | 33 | 0 ppb |
| Holmesville Water System LA1111008 | 2,406 | 0 | 0 | 7 | 0 ppb |
| Point Wilhite Ws LA1111012 | 2,292 | 0 | 0 | 8 | 0 ppb |
| Town of Bernice Water System LA1111001 | 1,863 | 0 | 0 | 28 | 0 ppb |
| Rocky Branch Water System LA1111013 | 1,650 | 0 | 0 | 20 | 1.6 ppb |
| Linville-Haile Water System LA1111010 | 1,635 | 0 | 0 | 38 | 2.4 ppb |
| Union Parish Waterworks District 1 LA1111015 | 1,626 | 0 | 0 | 39 | 0.8 ppb |
| Wards Chapel Water System LA1111016 | 1,620 | 0 | 0 | 46 | 1.2 ppb |
| Village of Marion Water System LA1111011 | 1,533 | 0 | 0 | 33 | 2 ppb |
| Sardis Water System LA1111021 | 1,404 | 0 | 0 | 49 | 0 ppb |
| Tri-Water System LA1111020 | 1,302 | 0 | 0 | 39 | 1 ppb |
| West Sterlington Water System LA1111017 | 1,095 | 0 | 0 | 31 | 1 ppb |
| Salem Water System LA1111014 | 753 | 0 | 0 | 48 | 0 ppb |
| Litroe Water System LA1111025 | 369 | 0 | 0 | 56 | 1 ppb |
| Village of Downsville Water System LA1111004 | 216 | 0 | 0 | 44 | 2 ppb |
| Corney Water System LA1111002 | 249 | 0 | 0 | 0 | 1.9 ppb |
ZIP reports in Union Parish
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.