Water Quality Report
Cook, MN
St. Louis County · 574 residents · 1 water system
10
Contaminants detected
0
PFAS compounds
—
Hardness (mg/L)
1
Above legal limits
3
Above health guidelines
Cook drinking water comes from groundwater wells. Based on the most recent monitoring data, 10 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 6 others.
Contaminants detected in Cook water
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Lead0 / 0.015 mg/L
0% of EPA limit
Nitrate0.025 / 10 mg/L
0% of EPA limit
Arsenic0.0022 / 0.01 mg/L
22% of EPA limit
Copper1.9 / 1.3 mg/L
144% of EPA limit
Radium0.5 / 5 pCi/L
10% of EPA limit
Uranium16.1 / 30 ug/L
54% of EPA limit
Total Trihalomethanes28.1 / 80 ug/L
35% of EPA limit
Haloacetic Acids (HAA5)4.7 / 60 ug/L
8% of EPA limit
Fluoride1.2 / 4 mg/L
30% of EPA limit
PFBA (Perfluorobutanoic Acid)0.36 ng/L
UnregulatedPFAS
Microplastics (not routinely tested)
Water systems serving Cook
Other cities in St. Louis County
Water quality reports for nearby Minnesota communities.
Frequently asked questions
Is Cook, MN tap water safe to drink?
Cook tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 3 above independent health guidelines. 10 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, Radium. View the detailed report for each water system to see specific levels, how they compare to both legal limits and health guidelines, and what actions to take.
What contaminants are in Cook water?
Monitoring has detected 10 contaminants in Cook's water supply: Lead, Nitrate, Arsenic, Copper, Radium, Uranium, Total Trihalomethanes, Haloacetic Acids (HAA5), Fluoride, PFBA (Perfluorobutanoic Acid). 1 of these are above EPA legal limits. 3 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Where does Cook get its drinking water?
Cook's drinking water comes from groundwater wells that draw from underground aquifers. The water is treated and tested according to Minnesota Department of Health and EPA requirements before distribution. Cook is served by one water system: Cook.
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