Calcasieu Parish County tap water
0 of 13 water systems serving Calcasieu Parish County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 42 community water systems list this county as served; 13 serve 3,300+ people with full PFAS testing.
- 11 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 Lake Charles Water System | Groundwater | 79,500 | No | 0 |
| City of Sulphur Water System | Groundwater | 24,489 | No | 0 |
| Calcasieu Parish Ww District No 1 | Groundwater | 20,837 | No | 0 |
| Calcasieu Parish Ww Dist 9 Carlyss | Groundwater | 14,502 | No | 0 |
| Houston River Waterworks District 11 | Groundwater | 6,915 | No | 1 |
| Calcasieu Parish Ww District 8 | Groundwater | 6,834 | No | 0 |
| Calcasieu Parish Ww District No 4 | Groundwater | 5,340 | No | 7 |
| Lawco - Dequincy Water System | Groundwater | 5,319 | No | 0 |
| Calcasieu Parish Ww District No 5 | Groundwater | 5,088 | No | 0 |
| City of Westlake Water System | Groundwater | 4,858 | No | 4 |
| Calcasieu Parish Ww District 7 | Groundwater | 4,791 | No | 0 |
| Town of Vinton Water System | Groundwater | 4,101 | No | 0 |
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.