Water quality in St. Marys, Iowa
St. Marys is in Warren County. 14 active public water systems serve the county; 6 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
13 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Martensdale Water Supply Martensdale |
421 | 0 | 4.4 mi | |
| New Virginia Water Supply New Virginia |
498 | 0 | 8.7 mi | |
| Indianola Water Supply Indianola |
15,833 | 1 | 9.5 mi | |
| North American Mobile Home Park Indianola |
235 | 1 | 9.5 mi | |
| Indian Ridge Mobile Home Community Indianola |
153 | 1 | 9.5 mi | |
| Sunfield Mobile Home Community Indianola |
80 | 1 | 9.5 mi | |
| Warren Water District Indianola |
20,095 | 0 | 9.6 mi | |
| Norwalk Water Supply Norwalk |
14,334 | 0 | 12.5 mi | |
| Wilshire Hills MHC Norwalk |
216 | 0 | 13.7 mi | |
| Milo Public Water Supply Milo |
788 | 1 | 15.3 mi | |
| Carlisle Water Supply Carlisle |
4,170 | 2 | 18.9 mi | |
| Lacona Water Supply Lacona |
361 | 0 | 19.9 mi | |
| Hartford MHC LLC Hartford |
183 | 0 | 20.0 mi |
About this data
Water systems are matched to Warren County, nearest to St. Marys 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 Iowa 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.