Water quality in Bay St. Louis, Mississippi
Bay St. Louis is in Hancock County. 22 active public water systems serve the county; 13 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 Hancock County
13 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Hancock County Water & Sewer |
3,254 | 3 | 3.4 mi | |
| Hancock County Utility Authority |
0 | 0 | 3.6 mi | |
| Hancock County Water & Sewer Bayside Bay St Louis |
2,458 | 0 | 4.3 mi | |
| Diamondhead Utilities-North |
12,577 | 1 | 5.3 mi | |
| Clermont Harbor |
61 | 3 | 6.4 mi | |
| Kiln Utility and Fire District of Hancoc |
7,051 | 1 | 7.7 mi | |
| City of Waveland Waveland |
6,400 | 2 | 7.7 mi | |
| Pearlington Water and Sewer District |
1,412 | 1 | 9.7 mi | |
| Standard Dedeaux Water Association |
5,386 | 1 | 14.9 mi | |
| Sunrise Mobile Home Park |
25 | 1 | 17.1 mi | |
| White Cypress Lakes |
507 | 3 | 19.5 mi | |
| Stennis Space Center |
4,700 | 0 | — | |
| Hancua-Pearlington |
0 | 0 | — |
Non-community systems in Hancock County (8: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Silver Slipper Casino & Hotel Bay St Louis |
3,285 | 1 | 0 | |
|
Bay Hide Away RV Park & Campground Bay St Louis |
50 | 0 | 0 | |
|
Coffee Culture Gulfport |
150 | 3 | 0 | |
|
Kapalama Well Pass Christian |
50 | 2 | 0 | |
|
Lafrance Fishing Camp |
100 | 0 | 0 | |
|
Port Bienville Ind Park |
95 | 0 | 0 | |
|
Infinity Science Center |
25 | 0 | 0 | |
|
Hancock County Welcome Center |
100 | 0 | 0 |
About this data
Water systems are matched to Hancock County, nearest to Bay St. Louis 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 or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
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 Mississippi 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.