County · Louisiana
Ouachita Parish, Louisiana: drinking water records
This overview covers 8 ZIP codes and 23 community water systems in Ouachita 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 |
|---|---|---|---|---|---|
| City of Monroe Water System LA1073031 | 57,000 | 120 | 1 | 6 | 0 ppb |
| West Monroe Water System LA1073056 | 16,005 | 300 | 0 | 12 | 1 ppb |
| West Hwy 80 Ark Road Ws LA1073055 | 14,649 | 120 | 0 | 6 | 3 ppb |
| Southwest Ouachita Waterworks, INC LA1073047 | 10,725 | 360 | 0 | 25 | 3 ppb |
| Brownville Water System LA1073004 | 9,696 | 180 | 0 | 11 | 2 ppb |
| Kiroli Darbonne Ws LA1073020 | 9,210 | 180 | 0 | 1 | 0 ppb |
| South Monroe Ws Gowc LA1073046 | 7,335 | 60 | 0 | 12 | 1 ppb |
| Cadeville Water District LA1073060 | 6,219 | 240 | 0 | 31 | 1 ppb |
| Gowc North Water System LA1073120 | 13,287 | 240 | 0 | 0 | 1 ppb |
| Gowc East Water System LA1073121 | 11,742 | 120 | 0 | 0 | 2 ppb |
| Cheniere Drew North Water System LA1073100 | 11,280 | 300 | 0 | 0 | 2 ppb |
| Prairie Road Water District LA1073040 | 2,598 | 0 | 0 | 25 | 2.3 ppb |
| Better Waterworks Water System LA1073003 | 2,160 | 0 | 0 | 21 | 1 ppb |
| Indian Village Water System LA1073058 | 2,082 | 0 | 0 | 23 | 0 ppb |
| Cheniere Drew South Water System LA1073099 | 1,563 | 0 | 0 | 7 | 6.7 ppb |
| L&r North Water System LA1073011 | 1,293 | 0 | 0 | 22 | 2 ppb |
| Lincoln Hills Subdivision Ws LA1073090 | 552 | 0 | 0 | 18 | 0 ppb |
| Hidden Oaks Subdivision Ws LA1073061 | 438 | 0 | 0 | 19 | 1 ppb |
| Mcclendon Community Water Well LA1073028 | 336 | 0 | 0 | 8 | 0 ppb |
| Ramsey Water System LA1073025 | 84 | 0 | 0 | 21 | 1 ppb |
| Pecan Lake Subdivision Ws LA1073063 | 57 | 0 | 0 | 13 | 1 ppb |
| Wildwood MHP Ws LA1073110 | 30 | 0 | 0 | 22 | 0 ppb |
| Frost Town Water System LA1073014 | 1,551 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Ouachita 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.