Potosi 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. Water hardness is 230 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.
Contaminants detected in Potosi water
11 total
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Potosi tap water meets EPA legal standards (Maximum Contaminant Levels). However, 3 contaminants are present above independent health guidelines, which are often stricter than legal limits. 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 and how they compare to both legal limits and health guidelines.
What contaminants are in Potosi water?
Monitoring has detected 11 contaminants in Potosi's water supply: Lead, Nitrate, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Selenium, Barium, Methyl Tert Butyl Ether. 3 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Potosi water have PFAS?
Potosi'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.
Is Potosi water hard?
Yes. Potosi water has a hardness of 230 mg/L (very hard). Hard water is not a health concern but can cause scale buildup in water heaters and appliances, reduce soap effectiveness, and leave mineral deposits. Water softeners or conditioning systems can address hardness.
Where does Potosi get its drinking water?
Potosi'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. Potosi is served by 3 water systems, the largest being POTOSI WATERWORKS (serving 718 people).
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