Minnesota
Washington County drinking water quality
195 active public water systems serve 264,630 people in Washington County. 174 are compliant, 21 had at least one EPA violation in the past three years, 0 are designated serious violators, and 1 carries a health flag.
Needs attention
Community water systems
29 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Woodbury |
82,643 | 1 | 0 | |
|
Cottage Grove |
42,760 | 0 | 0 | |
|
Oakdale |
30,144 | 0 | 0 | |
|
Stillwater |
19,462 | 1 | 0 | |
|
Hugo |
12,047 | 0 | 0 | |
|
Forest Lake |
11,800 | 0 | 0 | |
|
Lake Elmo |
10,978 | 1 | 0 | |
|
Mahtomedi |
8,818 | 0 | 0 | |
|
Saint Paul Park |
5,427 | 1 | 0 | |
|
Oak Park Heights |
4,776 | 0 | 0 | |
|
Newport |
4,000 | 0 | 0 | |
|
Lakeland Municipal Water |
3,500 | 0 | 0 | |
|
Bayport |
2,700 | 0 | 0 | |
|
Cimarron Park |
2,400 | 0 | 0 | |
|
Birchwood |
864 | 0 | 0 | |
|
MN Correctional Facility Stillwater |
781 | 0 | 0 | |
|
Willernie |
525 | 1 | 0 | |
|
Woodlund Mobile Home Park |
330 | 0 | 0 | |
|
Hugo Estates |
300 | 0 | 0 | |
|
Indian Hills Development |
156 | 0 | 0 | |
|
Eagle's Watch Development |
140 | 0 | 0 | |
|
Jackson Meadow |
95 | 0 | 0 | |
|
Bay Lake Reserve Development |
80 | 0 | 0 | |
|
Wyldewood Acres |
70 | 1 | 0 | |
|
Oakhill Cottages |
65 | 1 | 0 | |
|
Hilltop Water Company |
50 | 1 | 0 | |
|
Scandia Water Company |
35 | 3 | 1 | |
|
Marine Stugas Townhomes |
28 | 1 | 1 | |
|
Cedar Terrace Mobile Home Park |
25 | 1 | 1 |
Non-community systems (166: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (364, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.