COUNTY WATER-SYSTEM LEDGER
St. Mary Parish, Louisiana
EPA’s September 2026 export lists 8 active community water systems serving St. Mary Parish, Louisiana, with 2 current-violation flags and 2 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving St. Mary Parish, Louisiana
EPA associates 8 covered systems with St. Mary Parish, Louisiana; their reported population-served values total 60,247 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| City Of Morgan City Water SystemLA1101005 | 12,703 | Surface water | No current violation flagged |
| Water & Sewer Commission 4 Of St MaryLA1101011 | 9,709 | Surface water | No current violation flagged |
| City Of Patterson Water SystemLA1101006 | 8,456 | Surface water | No current violation flagged |
| City Of Franklin Water SupplyLA1101003 | 8,325 | Surface water | Current serious-violator flag |
| St Mary Water & Sewer Comm #3LA1101010 | 7,828 | Surface water | No current violation flagged |
| St Mary Parish W&S #2 Bayou VistaLA1101015 | 5,379 | Surface water purchased | No current violation flagged |
| City Of BerwickLA1101014 | 5,024 | Surface water purchased | No current violation flagged |
| St Mary Parish Water Sewerage Comm 1LA1101009 | 2,823 | Surface water | Current serious-violator flag |
02 / SOURCE MIX
Primary water sources for St. Mary Parish, Louisiana
EPA classifies 8 systems serving St. Mary Parish, Louisiana across 2 primary-source categories; Surface water is the largest category with 6 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.