Monona drinking water comes from groundwater wells. Based on the most recent monitoring data, 20 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, and 16 others. PFAS compounds have been detected at trace levels in Monona water. Water hardness is 502 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.
Contaminants detected in Monona water
20 total
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Monona 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. 20 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, Gross Alpha Radiation. 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 Monona water?
Monitoring has detected 20 contaminants in Monona's water supply: Lead, Nitrate, Copper, Radium, Gross Alpha Radiation, Tetrachloroethylene, Total Trihalomethanes, Haloacetic Acids (HAA5), Selenium, Xylenes, Fluoride, Chromium (total), Barium, Dichlorodifluoromethane, Ethylbenzene, Gross Beta, PFHpA (Perfluoroheptanoic Acid), PFBA (Perfluorobutanoic Acid), Pfpea, Pfhxa. Additionally, 8 PFAS compounds have been detected at trace levels. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Monona water have PFAS?
Yes. 8 PFAS compounds have been detected in Monona's water supply at trace levels. PFAS are sometimes called "forever chemicals" because they do not break down in the environment. The EPA has set Maximum Contaminant Levels for several PFAS compounds. View the detailed report for specific concentrations.
Is Monona water hard?
Yes. Monona water has a hardness of 502 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 Monona get its drinking water?
Monona'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. Monona is served by one water system: MONONA WATERWORKS.
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