Water quality in Patterson, Louisiana
Patterson is in St. Mary Parish. 16 active public water systems serve the county; 11 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in St. Mary Parish
11 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| ST Mary Parish W&s #2 Bayou Vista |
5,379 | 0 | 2.5 mi | |
| City of Berwick |
5,024 | 2 | 4.7 mi | |
| City of Morgan City Water System |
12,703 | 1 | 7.0 mi | |
| ST Mary Water & Sewer Comm #3 |
7,828 | 1 | 7.6 mi | |
| ST Mary Parish Water Sewerage Comm 1 |
2,823 | 4 | 13.2 mi | |
| City of Franklin Water Supply |
8,325 | 5 | 13.8 mi | |
| Berwick Bayou Vista WW Commission |
0 | 1 | 16.0 mi | |
| Water & Sewer Commission 4 of ST Mary |
9,709 | 1 | 18.3 mi | |
| ST Mary Par JT Water Sewer Commission 5 |
1,240 | 2 | 22.4 mi | |
| Port of West ST Mary |
400 | 2 | 27.2 mi | |
| Glencoe Community Water System |
190 | 1 | 32.9 mi |
Non-community systems in St. Mary Parish (4: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Compass Minerals la |
156 | 0 | 0 | |
|
Quintana Marina |
280 | 0 | 0 | |
|
Cypremort Point State Park |
500 | 0 | 0 | |
|
Bayview Development |
100 | 0 | 0 |
About this data
Water systems are matched to St. Mary Parish, nearest to Patterson first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Louisiana records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.