Water quality in Ballwin, Missouri
Ballwin is in St. Louis County. 25 active public water systems serve the county; 14 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. Louis County
5 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| MO American Pevely Farms |
343 | 0 | 4.3 mi | |
| Kirkwood PWS Kirkwood |
28,000 | 0 | 7.1 mi | |
| MO Eastern Correctional Center |
1,100 | 0 | 11.5 mi | |
| Pacific PWS Pacific |
6,000 | 4 | 14.1 mi | |
| Terrisan |
240 | 2 | — |
Non-community systems in St. Louis County (19: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
World Bird Sanctuary |
25 | 0 | 0 | |
|
Lone Elk County Park |
25 | 1 | 0 | |
|
Tyson Research Center |
26 | 2 | 0 | |
|
Rocket #4224 |
25 | 2 | 1 | |
|
Jay Henges Range |
50 | 1 | 0 | |
|
Crescent Farms Golf Club |
100 | 0 | 0 | |
|
Aberdeen Golf Club |
25 | 2 | 2 | |
|
Marianist Retreat Center |
25 | 1 | 0 | |
|
West Tyson County Park |
30 | 2 | 1 | |
|
Paradise Valley Golf & Country Club |
50 | 2 | 0 | |
|
Rockwoods Reservation |
550 | 0 | 0 | |
|
Hidden Valley Golf and Ski |
100 | 0 | 0 | |
|
Greensfelder County Park |
100 | 0 | 0 | |
|
Babler State Park |
500 | 0 | 0 | |
|
Wyman |
50 | 2 | 1 | |
|
Six Flags ST Louis |
3,200 | 0 | 0 | |
|
Holiday Inn at Six Flags |
30 | 1 | 1 | |
|
Jellystone Park Cmpgrd |
25 | 1 | 0 | |
|
Pond Athletic Association Ballpark |
25 | 1 | 0 |
About this data
Water systems are matched to St. Louis County, nearest to Ballwin 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 Missouri 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. Retrieved from ECHO on Oct 11, 2026.