Water quality for ZIP code 63357
ZIP 63357 covers Three Creeks and Marthasville in Warren County, Missouri, one of 6 ZIP codes in the county. 31 active public water systems serve the county; 17 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 Warren County
17 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Marthasville PWS Marthasville |
1,200 | 3 | 2.7 mi | |
| ST Charles County Pwsd 2 Dutzow |
400 | 0 | 4.6 mi | |
| Lake Sherwood Subd |
1,100 | 4 | 6.0 mi | |
| Innsbrook |
810 | 2 | 7.9 mi | |
| Warrenton PWS Warrenton |
8,208 | 0 | 10.3 mi | |
| Cedar Grove Village Subd |
60 | 4 | 10.5 mi | |
| Truesdale PWS Truesdale |
853 | 0 | 10.8 mi | |
| Glenbrook Estates |
100 | 2 | 11.0 mi | |
| Country Cove |
52 | 3 | 11.1 mi | |
| ST Charles County Pwsd 2 North Oak DR |
660 | 1 | 11.6 mi | |
| Great Oak Subdivision Wright City |
30 | 1 | 12.3 mi | |
| ST Charles CO Pwsd #2 Wright City Wright City |
3,550 | 1 | 12.3 mi | |
| Pleasant Oak MHP |
150 | 3 | 12.4 mi | |
| MO American Warren County Water & Sewer |
1,200 | 0 | 15.7 mi | |
| Montgomery CO Pwsd 1 |
3,850 | 4 | 20.5 mi | |
| Maple Ridge MHP |
140 | 1 | — | |
| Valley Lake Estates |
40 | 3 | — |
Non-community systems in Warren County (13: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Treloar Bar and Grill Marthasville |
75 | 0 | 0 | |
|
Garage Bar Marthasville |
25 | 0 | 0 | |
|
ST Ignatius Loyola School |
60 | 1 | 0 | |
|
Warco Mfg CO |
32 | 0 | 0 | |
|
Lake Creek Farm Winery Marthasville |
25 | 0 | 0 | |
|
Temco |
50 | 1 | 0 | |
|
Washington Airport |
25 | 0 | 0 | |
|
Dollar General #24942 Innsbrook |
25 | 0 | 0 | |
|
Cedar Lake Cellars |
50 | 3 | 2 | |
|
American Foods Group |
1,100 | 1 | 1 | |
|
Big Joels Safari |
500 | 0 | 0 | |
|
Dogwood Lake Campground |
200 | 0 | 0 | |
|
Blumenhof Winery |
30 | 0 | 0 |
About this data
Water systems are matched to Warren County, the county this ZIP code lies in, nearest to the ZIP code's centre 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.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.