Minnesota drinking water quality
Minnesota has 6,574 active public water systems serving 5.3 million people. 554 of them, 8%, had at least one EPA violation in the past three years, 118 have an unresolved violation today, and 20 are designated serious violators by the EPA.
Active systems
6,574
in 87 counties
People served
5.3M
998 community systems serve 4.7M
Violations, past 3 years
554
8% of active systems
Serious violators
20
22 systems carry a health flag
Largest counties
All 87 countiesLargest community water systems
All 6,574 systems| System | Serves | Status |
|---|---|---|
| Minneapolis Hennepin County |
425,300 | |
| Saint Paul Regional Water Services Ramsey County |
392,529 | |
| Rochester Olmsted County |
123,624 | |
| Bloomington Hennepin County |
91,300 | |
| Brooklyn Park Hennepin County |
89,995 | |
| Duluth St. Louis County |
86,859 | |
| Woodbury Washington County |
82,643 | |
| Maple Grove Hennepin County |
82,000 | |
| Plymouth Hennepin County |
76,546 | |
| Saint Cloud Stearns County |
71,321 |
About the Minnesota data
Retrieved from EPA ECHO on Oct 11, 2026. EPA records for Minnesota systems do not include town names, so searches here match on ZIP code, street address, or county.