Water Quality Report
Westby, WI
Vernon County · 2,544 residents · 3 water systems
11
Contaminants detected
0
PFAS compounds
—
Hardness (mg/L)
1
Above legal limits
3
Above health guidelines
Westby drinking water comes from groundwater wells. Based on the most recent monitoring data, 11 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, and 7 others. PFAS testing has been conducted with no detections.
Contaminants detected in Westby water
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Lead0.0015 / 0.015 mg/L
10% of EPA limit
Nitrate1.5 / 10 mg/L
15% of EPA limit
Copper118 / 1300 ug/L
9% of EPA limit
Radium2.7 / 5 pCi/L
54% of EPA limit
Uranium0.51 / 30 ug/L
2% of EPA limit
Gross Alpha Radiation4 / 15 pCi/L
27% of EPA limit
Total Trihalomethanes1.6 / 80 ug/L
2% of EPA limit
Haloacetic Acids (HAA5)5.1 / 60 ug/L
8% of EPA limit
Selenium0.001 / 0.05 mg/L
2% of EPA limit
Barium0.0154 / 2 mg/L
1% of EPA limit
Fluoride0.07 / 4 mg/L
2% of EPA limit
PFAS (tested — none detected)
Microplastics (not routinely tested)
Other cities in Vernon County
Water quality reports for nearby Wisconsin communities.
Frequently asked questions
Is Westby, WI tap water safe to drink?
Westby tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 3 above independent health guidelines. 11 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, Uranium. 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 Westby water?
Monitoring has detected 11 contaminants in Westby's water supply: Lead, Nitrate, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Selenium, Barium, Fluoride. 1 of these are above EPA legal limits. 3 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Westby water have PFAS?
Westby's water has been tested for PFAS compounds with no detections. Testing was conducted as part of the EPA's Unregulated Contaminant Monitoring Rule (UCMR5) program.
Where does Westby get its drinking water?
Westby'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. Westby is served by 3 water systems, the largest being WESTBY WATERWORKS (serving 2,400 people).
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