Janesville drinking water comes from groundwater wells. Based on the most recent monitoring data, 13 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, and 9 others. PFAS compounds have been detected at trace levels in Janesville water.
Contaminants detected in Janesville water
13 total
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Janesville tap water meets EPA legal standards (Maximum Contaminant Levels). However, 4 contaminants are present above independent health guidelines, which are often stricter than legal limits. 13 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 Janesville water?
Monitoring has detected 13 contaminants in Janesville's water supply: Lead, Nitrate, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Atrazine, Nickel, Fluoride, Dibromomethane, Barium. Additionally, 5 PFAS compounds have been detected at trace levels. 4 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Janesville water have PFAS?
Yes. 5 PFAS compounds have been detected in Janesville'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.
Where does Janesville get its drinking water?
Janesville'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. Janesville is served by 2 water systems, the largest being JANESVILLE WATER UTILITY (serving 64,415 people).
Check your water quality
Enter your address for a detailed report specific to your water system.
On a private well? Search your address for nearby groundwater monitoring data.