Water Quality Report
Grantsburg, WI
Burnett County · 1,575 residents · 2 water systems
12
Contaminants detected
0
PFAS compounds
—
Hardness (mg/L)
0
Above legal limits
2
Above health guidelines
Grantsburg drinking water comes from groundwater wells. Based on the most recent monitoring data, 12 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 8 others.
Contaminants detected in Grantsburg water
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Lead0.002 / 0.015 mg/L
13% of EPA limit
Nitrate0.03 / 10 mg/L
0% of EPA limit
Arsenic0.0013 / 0.01 mg/L
13% of EPA limit
Copper46 / 1300 ug/L
4% of EPA limit
Radium0.9178 / 5 pCi/L
18% of EPA limit
Uranium0.307 / 30 ug/L
1% of EPA limit
Gross Alpha Radiation2.3 / 15 pCi/L
16% of EPA limit
Total Trihalomethanes52.2 / 80 ug/L
65% of EPA limit
Haloacetic Acids (HAA5)7.6 / 60 ug/L
13% of EPA limit
Selenium0.001 / 0.05 mg/L
2% of EPA limit
Fluoride0.3 / 4 mg/L
8% of EPA limit
Barium0.067 / 2 mg/L
3% of EPA limit
Microplastics (not routinely tested)
Other cities in Burnett County
Water quality reports for nearby Wisconsin communities.
Frequently asked questions
Is Grantsburg, WI tap water safe to drink?
Grantsburg tap water meets EPA legal standards (Maximum Contaminant Levels). However, 2 contaminants are present above independent health guidelines, which are often stricter than legal limits. 12 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 and how they compare to both legal limits and health guidelines.
What contaminants are in Grantsburg water?
Monitoring has detected 12 contaminants in Grantsburg's water supply: Lead, Nitrate, Arsenic, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Selenium, Fluoride, Barium. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Where does Grantsburg get its drinking water?
Grantsburg's drinking water comes from groundwater wells that draw from underground aquifers. The water is treated and tested according to Wisconsin DNR and EPA requirements before distribution. Grantsburg is served by 2 water systems, the largest being GRANTSBURG WATERWORKS (serving 1,460 people).
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