Ouachita Parish County tap water
0 of 12 water systems serving Ouachita Parish County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 26 community water systems list this county as served; 12 serve 3,300+ people with full PFAS testing.
- 17 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| City of Monroe Water System | Surface water | 57,000 | No | 4 |
| City of West Monroe Water System | Groundwater | 16,005 | No | 5 |
| Gowc West Hwy 80 Ark Road Ws | Groundwater | 14,649 | No | 0 |
| Gowc North Water System | Groundwater | 13,287 | No | 0 |
| Gowc East Water System | Groundwater | 11,742 | No | 0 |
| Cheniere Drew North Water System | Groundwater | 11,280 | No | 0 |
| Southwest Ouachita Waterworks, Inc | Groundwater | 10,725 | No | 4 |
| Gowc Brownville Water System | Groundwater | 9,696 | No | 0 |
| Gowc Kiroli Darbonne Ws | Groundwater | 9,210 | No | 0 |
| Gowc South Monroe Ws | Groundwater | 7,335 | No | 3 |
| Cadeville Water District | Groundwater | 6,219 | No | 2 |
| Magnolia - Town & Country Service | Purchased surface water | 5,715 | No | 1 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.