Water quality for ZIP code 55090
ZIP 55090 covers Willernie and Mahtomedi in Washington County, Minnesota, one of 16 ZIP codes in the county. 195 active public water systems serve the county; 21 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 Washington County
28 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Mahtomedi |
8,818 | 0 | 0.2 mi | |
| Birchwood |
864 | 0 | 1.0 mi | |
| Cedar Terrace Mobile Home Park |
25 | 1 | 2.2 mi | |
| Indian Hills Development |
156 | 0 | 3.0 mi | |
| Oakdale |
30,144 | 0 | 4.6 mi | |
| Lake Elmo |
10,978 | 1 | 5.3 mi | |
| Stillwater |
19,462 | 1 | 6.2 mi | |
| Oak Park Heights |
4,776 | 0 | 6.9 mi | |
| Bay Lake Reserve Development |
80 | 0 | 7.2 mi | |
| Hugo |
12,047 | 0 | 7.4 mi | |
| Cimarron Park |
2,400 | 0 | 7.6 mi | |
| Hugo Estates |
300 | 0 | 8.0 mi | |
| MN Correctional Facility Stillwater |
781 | 0 | 8.4 mi | |
| Bayport |
2,700 | 0 | 8.8 mi | |
| Woodbury |
82,643 | 1 | 9.7 mi | |
| Lakeland Municipal Water |
3,500 | 0 | 11.9 mi | |
| Newport |
4,000 | 0 | 12.7 mi | |
| Jackson Meadow |
95 | 0 | 12.7 mi | |
| Marine Stugas Townhomes |
28 | 1 | 14.1 mi | |
| Woodlund Mobile Home Park |
330 | 0 | 14.5 mi | |
| Forest Lake |
11,800 | 0 | 14.6 mi | |
| Saint Paul Park |
5,427 | 1 | 14.9 mi | |
| Wyldewood Acres |
70 | 1 | 15.3 mi | |
| Oakhill Cottages |
65 | 1 | 15.5 mi | |
| Hilltop Water Company |
50 | 1 | 15.7 mi |
Non-community systems in Washington County (166: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Washington 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 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.