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Water Quality Report

Stoughton, WI

Dane County · 13,078 residents · 1 water system

12

Contaminants detected

5

PFAS compounds

Hardness (mg/L)

0

Above legal limits

2

Above health guidelines

Stoughton 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, Copper, Radium, and 8 others. PFAS compounds have been detected at trace levels in Stoughton water.

Contaminants detected in Stoughton water

Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.

Lead0.0042 / 0.015 mg/L
28% of EPA limit
Nitrate4.1 / 10 mg/L
41% of EPA limit
Copper180 / 1300 ug/L
14% of EPA limit
Radium3.5 / 5 pCi/L
70% of EPA limit
Uranium0.745 / 30 ug/L
2% of EPA limit
Gross Alpha Radiation7.5 / 15 pCi/L
50% of EPA limit
Total Trihalomethanes13.8 / 80 ug/L
17% of EPA limit
4% of EPA limit
Nickel0.0015 mg/L
UnregulatedInorganic
Fluoride0.703 / 4 mg/L
18% of EPA limit
Beryllium0.000071 / 0.004 mg/L
2% of EPA limit
Barium0.046 / 2 mg/L
2% of EPA limit
PFAS (5 compounds detected)
Microplastics (not routinely tested)

Other cities in Dane County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Stoughton, WI tap water safe to drink?
Stoughton 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, 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 Stoughton water?
Monitoring has detected 12 contaminants in Stoughton's water supply: Lead, Nitrate, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Fluoride, Beryllium, Barium. Additionally, 5 PFAS compounds have been detected at trace levels. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Stoughton water have PFAS?
Yes. 5 PFAS compounds have been detected in Stoughton'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 Stoughton get its drinking water?
Stoughton'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. Stoughton is served by one water system: STOUGHTON WATERWORKS.

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