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Water Quality Report

Kewaunee, WI

Kewaunee County · 2,848 residents · 1 water system

15

Contaminants detected

2

PFAS compounds

440

Hardness (mg/L)

1

Above legal limits

2

Above health guidelines

Kewaunee drinking water comes from groundwater wells. Based on the most recent monitoring data, 15 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, and 11 others. PFAS compounds have been detected at trace levels in Kewaunee water. Water hardness is 440 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Kewaunee water

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

Lead0.0045 / 0.015 mg/L
30% of EPA limit
Nitrate0.23 / 10 mg/L
2% of EPA limit
Copper194 / 1300 ug/L
15% of EPA limit
Radium1.1 / 5 pCi/L
21% of EPA limit
Uranium0.162 / 30 ug/L
1% of EPA limit
Gross Alpha Radiation1.1 / 15 pCi/L
7% of EPA limit
Total Trihalomethanes4.7 / 80 ug/L
6% of EPA limit
Haloacetic Acids (HAA5)2.1 / 60 ug/L
3% of EPA limit
Nickel0.0014 mg/L
UnregulatedInorganic
PFHpA (Perfluoroheptanoic Acid)0.48 ng/L
UnregulatedPFAS
Dichloromethane10 / 5 ug/L
150% of EPA limit
Barium0.042 / 2 mg/L
2% of EPA limit
Fluoride1.4 / 4 mg/L
35% of EPA limit
Phosphorus Total560 ug/L
Unregulated
Orthophosphate740 ug/L
Unregulated
PFAS (2 compounds detected)
Microplastics (not routinely tested)

Water systems serving Kewaunee

KEWAUNEE WATERWORKS

2,848 servedGroundwater15 contaminants1 above legal limit2 above guidelines
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Other cities in Kewaunee County

Water quality reports for nearby Wisconsin communities.

AlgomaLuxemburg

Frequently asked questions

Is Kewaunee, WI tap water safe to drink?
Kewaunee tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 2 above independent health guidelines. 15 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, how they compare to both legal limits and health guidelines, and what actions to take.
What contaminants are in Kewaunee water?
Monitoring has detected 15 contaminants in Kewaunee's water supply: Lead, Nitrate, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, PFHpA (Perfluoroheptanoic Acid), Dichloromethane, Barium, Fluoride, Phosphorus Total, Orthophosphate. Additionally, 2 PFAS compounds have been detected at trace levels. 1 of these are above EPA legal limits. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Kewaunee water have PFAS?
Yes. 2 PFAS compounds have been detected in Kewaunee'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 Kewaunee water hard?
Yes. Kewaunee water has a hardness of 440 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 Kewaunee get its drinking water?
Kewaunee'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. Kewaunee is served by one water system: KEWAUNEE WATERWORKS.

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