Water quality for ZIP code 55903
ZIP 55903 covers Rochester in Olmsted County, Minnesota, one of 12 ZIP codes in the county. 85 active public water systems serve the county; 7 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Olmsted County
17 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| Stewartville |
6,850 | 0 | |
| Byron |
6,809 | 0 | |
| Eyota |
2,043 | 0 | |
| Oronoco |
2,040 | 0 | |
| Dover |
895 | 0 | |
| Oronoco Estates MHC |
505 | 0 | |
| Chester Heights |
300 | 1 | |
| Zumbro Ridge Estates |
270 | 2 | |
| Hallmark Terrace Mobile Home Park |
170 | 0 | |
| Sandy Slopes Community |
158 | 0 | |
| Meadowbrook Addition |
125 | 0 | |
| Briarwood Subdivision |
90 | 1 | |
| Chosen Valley Mobile Home Park |
73 | 2 | |
| Clearwater Well Company |
65 | 0 | |
| Country Home Trailer Park |
56 | 0 | |
| Sunrise Mobile Home Park |
50 | 2 | |
| Kings Park Hyland Addition |
40 | 0 |
Non-community systems in Olmsted County (67: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Olmsted County, the county this ZIP code lies in, largest 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.
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 Minnesota 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.