Water quality for ZIP code 64780
ZIP 64780 covers Rockville in St. Clair County, Missouri, one of 6 ZIP codes in the county. 16 active public water systems serve the county; 11 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in St. Clair County
5 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Harry S Truman Pwsd 2 Clinton |
2,700 | 4 | 15.2 mi | |
| Lowry City PWS Lowry City |
640 | 4 | 18.2 mi | |
| Osceola PWS Osceola |
947 | 1 | 19.1 mi | |
| Twin Oaks Harbor |
50 | 0 | 25.1 mi | |
| Collins PWS Collins |
125 | 2 | 26.1 mi |
Non-community systems in St. Clair County (10: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Roscoe C 1 Elementary School |
90 | 2 | 0 | |
|
Wildflower Inn |
32 | 1 | 0 | |
|
Countryside Trading Post |
100 | 0 | 0 | |
|
Osceola Cheese Company |
500 | 0 | 0 | |
|
Osceola Public School |
575 | 2 | 0 | |
|
Sugarfoot Barbeque Osceola |
128 | 1 | 0 | |
|
Krebs Mobile Home Living |
200 | 0 | 0 | |
|
Collins Pilot 385 |
735 | 1 | 1 | |
|
H Roe Bartle Scout Reservation |
1,800 | 2 | 0 | |
|
Usace Truman Berry Bend South |
50 | 0 | 0 |
About this data
Water systems are matched to St. Clair 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.
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.