Water Quality Report
Randolph, WI
Columbia County · 1,800 residents · 1 water system
12
Contaminants detected
0
PFAS compounds
—
Hardness (mg/L)
0
Above legal limits
2
Above health guidelines
Randolph 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 Randolph water
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Lead0.0013 / 0.015 mg/L
9% of EPA limit
Nitrate0.29 / 10 mg/L
3% of EPA limit
Arsenic0.00059 / 0.01 mg/L
6% of EPA limit
Copper96.7 / 1300 ug/L
7% of EPA limit
Radium3.3 / 5 pCi/L
66% of EPA limit
Uranium0.279 / 30 ug/L
1% of EPA limit
Gross Alpha Radiation3.6 / 15 pCi/L
24% of EPA limit
Total Trihalomethanes6.2 / 80 ug/L
8% of EPA limit
Haloacetic Acids (HAA5)3.5 / 60 ug/L
6% of EPA limit
Barium0.12 / 2 mg/L
6% of EPA limit
Fluoride0.21 / 4 mg/L
5% of EPA limit
Carbon Tetrachloride0.39 / 5 ug/L
8% of EPA limit
Microplastics (not routinely tested)
Water systems serving Randolph
Other cities in Columbia County
Water quality reports for nearby Wisconsin communities.
Frequently asked questions
Is Randolph, WI tap water safe to drink?
Randolph 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 Randolph water?
Monitoring has detected 12 contaminants in Randolph's water supply: Lead, Nitrate, Arsenic, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Barium, Fluoride, Carbon Tetrachloride. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Where does Randolph get its drinking water?
Randolph'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. Randolph is served by one water system: RANDOLPH WATER DEPT.
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