County · Louisiana
St. Landry Parish, Louisiana: drinking water records
This overview covers 13 ZIP codes and 27 community water systems in St. Landry Parish. It also stands in for 1 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 |
|---|---|---|---|---|---|
| City of Opelousas Water System LA1097010 | 20,388 | 120 | 0 | 7 | 2 ppb |
| Town of Leonville Water System LA1097005 | 9,552 | 180 | 0 | 8 | 2.5 ppb |
| Savoy Swords Water System INC LA1097024 | 7,326 | 120 | 0 | 2 | 1 ppb |
| Plaisance Water System LA1097012 | 6,465 | 60 | 0 | 2 | 0 ppb |
| Prairie Ronde Water System INC LA1097014 | 6,090 | 120 | 0 | 2 | 0 ppb |
| St Landry Water Works District 2 Rural LA1097033 | 4,761 | 60 | 0 | 2 | 0.9 ppb |
| Town of Sunset Water System LA1097015 | 4,356 | 120 | 0 | 5 | 0.4 ppb |
| Lawtell Water Works District No 1 LA1097004 | 3,717 | 60 | 0 | 1 | 0 ppb |
| Lawco - Eunice Water System LA1097022 | 15,393 | 120 | 0 | 0 | 2 ppb |
| Lewisburg Bellevue Water System LA1097006 | 8,226 | 60 | 0 | 0 | 0 ppb |
| Town of Port Barre Water System LA1097013 | 3,828 | 60 | 0 | 0 | 0.8 ppb |
| Village of Cankton Water System LA1097025 | 2,730 | 0 | 0 | 6 | 0 ppb |
| Mamou Road Water District, INC LA1097018 | 2,478 | 0 | 0 | 2 | 0 ppb |
| Village of Palmetto Water System LA1097011 | 2,178 | 0 | 0 | 25 | 3 ppb |
| St Landry Wwd 3 Port Barre Area D LA1097037 | 1,860 | 0 | 0 | 1 | 0 ppb |
| Town of Washington Water System LA1097016 | 1,713 | 0 | 0 | 4 | 1 ppb |
| Greenbriar Prairie Basse Water System LA1097032 | 1,656 | 0 | 0 | 1 | 0 ppb |
| Town of Grand Coteau Water System LA1097001 | 1,650 | 0 | 0 | 14 | 7 ppb |
| Town of Melville Water System LA1097007 | 1,314 | 0 | 0 | 5 | 2 ppb |
| St Landry Wwd 3 Port Barre Area B LA1097035 | 516 | 0 | 0 | 6 | 0 ppb |
| Hidden Hills Subdivision Water System LA1097026 | 240 | 0 | 0 | 1 | 0 ppb |
| Midway Water System INC LA1097008 | 192 | 0 | 0 | 11 | 1 ppb |
| Town of Krotz Springs Water System LA1097003 | 2,130 | 0 | 0 | 0 | 0 ppb |
| Morrow Water System INC LA1097009 | 1,572 | 0 | 0 | 0 | 0 ppb |
| St Landry Waterworks District No. 5 LA1097039 | 519 | 0 | 0 | 0 | 0.8 ppb |
ZIP reports in St. Landry Parish
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 71345.
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.