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Water Quality Report

Mazomanie, WI

Dane County · 1,744 residents · 1 water system

13

Contaminants detected

5

PFAS compounds

—

Hardness (mg/L)

0

Above legal limits

2

Above health guidelines

Mazomanie 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 Mazomanie water.

Contaminants detected in Mazomanie water

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

Lead0 / 0.015 mg/L
0% of EPA limit
Nitrate1.8 / 10 mg/L
18% of EPA limit
Copper852 / 1300 ug/L
66% of EPA limit
Radium2.6 / 5 pCi/L
53% of EPA limit
Uranium0.91 / 30 ug/L
3% of EPA limit
Gross Alpha Radiation1.9 / 15 pCi/L
13% of EPA limit
Total Trihalomethanes7.3 / 80 ug/L
9% of EPA limit
Haloacetic Acids (HAA5)9.7 / 60 ug/L
16% of EPA limit
Selenium0.002 / 0.05 mg/L
4% of EPA limit
Fluoride0.726 / 4 mg/L
18% of EPA limit
PFHpA (Perfluoroheptanoic Acid)1.1 ng/L
UnregulatedPFAS
Mercury (inorganic)0.0001 / 0.002 mg/L
5% of EPA limit
Barium0.0387 / 2 mg/L
2% of EPA limit
PFAS (5 compounds detected)
Microplastics (not routinely tested)

Water systems serving Mazomanie

MAZOMANIE WATERWORKS

1,744 servedGroundwater13 contaminants2 above guidelines
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Other cities in Dane County

Water quality reports for nearby Wisconsin communities.

Black EarthBlue MoundsCambridgeCottage GroveCross PlainsDaneDeerfieldDeforestFitchburgMadisonMarshallMcfarland

Frequently asked questions

Is Mazomanie, WI tap water safe to drink?
Mazomanie 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. 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 Mazomanie water?
Monitoring has detected 13 contaminants in Mazomanie's water supply: Lead, Nitrate, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Selenium, Fluoride, PFHpA (Perfluoroheptanoic Acid), Mercury (inorganic), 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 Mazomanie water have PFAS?
Yes. 5 PFAS compounds have been detected in Mazomanie'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 Mazomanie get its drinking water?
Mazomanie'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. Mazomanie is served by one water system: MAZOMANIE WATERWORKS.

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