County · Louisiana
Caldwell Parish, Louisiana: drinking water records
This overview covers 4 ZIP codes and 11 community water systems in Caldwell 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 |
|---|---|---|---|---|---|
| East Columbia Water System LA1021004 | 2,829 | 0 | 0 | 24 | 0 ppb |
| Columbia Heights Water District LA1021003 | 1,965 | 0 | 0 | 2 | 2.8 ppb |
| Village of Grayson Water System LA1021005 | 1,461 | 0 | 0 | 14 | 0.8 ppb |
| Holum Water System LA1021007 | 1,230 | 0 | 0 | 32 | 1 ppb |
| Wards 4 & 5 Water System LA1021010 | 1,002 | 0 | 0 | 3 | 5 ppb |
| Town of Clarks Water System LA1021001 | 906 | 0 | 0 | 4 | 0 ppb |
| Cotton Plant Water System LA1021009 | 783 | 0 | 0 | 7 | 0 ppb |
| Vixen Water System LA1021011 | 750 | 0 | 0 | 84 | 0 ppb |
| Hebert Water System LA1021006 | 3,048 | 0 | 0 | 0 | 0 ppb |
| Kelly Water District LA1021008 | 1,314 | 0 | 0 | 0 | 0.9 ppb |
| Village of Columbia Water System LA1021002 | 945 | 0 | 0 | 0 | 2 ppb |
ZIP reports in Caldwell 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.