waterbycounty

Minnesota Water Quality

Drinking water data for all 87 counties.

Avg Water Score

67.2

State Grade

C

Counties with Data

87

of 87 total

All Minnesota Counties

CountyWater Score
Anoka County86.0
Benton County86.0
Big Stone County86.0
Brown County86.0
Carlton County86.0
Carver County86.0
Cass County86.0
Chippewa County86.0
Clearwater County86.0
Cook County86.0
Cottonwood County86.0
Dodge County86.0
Faribault County86.0
Fillmore County86.0
Hennepin County86.0
Houston County86.0
Hubbard County86.0
Isanti County86.0
Itasca County86.0
Kanabec County86.0
Kittson County86.0
Koochiching County86.0
Lac qui Parle County86.0
Lake County86.0
Lake of the Woods County86.0
Le Sueur County86.0
Lincoln County86.0
Lyon County86.0
Mahnomen County86.0
Mille Lacs County86.0
Murray County86.0
Olmsted County86.0
Pipestone County86.0
Pope County86.0
Ramsey County86.0
Red Lake County86.0
Redwood County86.0
Renville County86.0
Rock County86.0
Sherburne County86.0
Stevens County86.0
Swift County86.0
Todd County86.0
Wabasha County86.0
Wadena County86.0
Waseca County86.0
Washington County86.0
Watonwan County86.0
Wilkin County86.0
Stearns County69.0
Wright County68.2
Dakota County66.2
Crow Wing County65.3
Rice County64.8
Clay County62.0
Beltrami County61.0
Goodhue County60.4
Scott County59.8
Steele County59.8
Winona County58.6
St. Louis County57.2
Pennington County54.5
Blue Earth County54.4
Mower County53.0
Martin County52.3
Yellow Medicine County51.0
McLeod County50.9
Chisago County49.0
Freeborn County46.4
Nicollet County44.6
Morrison County42.6
Meeker County39.2
Pine County38.3
Marshall County37.3
Nobles County35.6
Jackson County34.2
Polk County31.7
Aitkin County25.8
Kandiyohi County23.7
Becker County21.3
Norman County20.5
Douglas County18.6
Grant County16.4
Traverse County16.0
Otter Tail County12.0
Roseau County7.4
Sibley County5.5

Concerned about your water quality?

Berkey water filters remove contaminants at home.

Shop Filters →

Sponsored

Frequently Asked Questions

Which county in Minnesota has the best water quality?
Anoka County has the highest water quality score in Minnesota at 86.0/100 (Grade: A), based on EPA SDWIS data.
Which county in Minnesota has the most water violations?
Sibley County has among the lowest water quality scores in Minnesota at 5.5/100. See the individual county page for detailed violation history.
Is the tap water safe to drink in Minnesota?
Minnesota has an average water quality score of 67.2/100 based on EPA Safe Drinking Water Act compliance data. Individual county scores vary — check your specific county's page for detailed information.
What contaminants are found in Minnesota water supplies?
Drinking water quality varies by county and water system. The EPA Safe Drinking Water Information System (SDWIS) tracks violations for contaminants like lead, nitrates, bacteria, and disinfection byproducts. See individual county pages for specific contaminant and violation history.

Data Source

Water quality data sourced from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

← Back to All States

Explore more data for Minnesota

Property TaxCost of LivingCrime RateIncomeHealthSchoolsDisaster RiskWeatherCounty Score