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Water Quality Report

Kewaskum, WI

Washington County · 4,309 residents · 1 water system

12

Contaminants detected

5

PFAS compounds

580

Hardness (mg/L)

0

Above legal limits

2

Above health guidelines

Kewaskum 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, Arsenic, Copper, and 8 others. PFAS compounds have been detected at trace levels in Kewaskum water. Water hardness is 580 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Kewaskum 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
Nitrate0.61 / 10 mg/L
6% of EPA limit
Arsenic0.005 / 0.01 mg/L
50% of EPA limit
Copper320 / 1300 ug/L
25% of EPA limit
Total Trihalomethanes17.9 / 80 ug/L
22% of EPA limit
Haloacetic Acids (HAA5)6.4 / 60 ug/L
11% of EPA limit
Nickel0.0072 mg/L
UnregulatedInorganic
PFHpA (Perfluoroheptanoic Acid)0.96 ng/L
UnregulatedPFAS
Fluoride0.639 / 4 mg/L
16% of EPA limit
Thallium0.0011 / 0.002 mg/L
55% of EPA limit
Barium0.17 / 2 mg/L
9% of EPA limit
Phosphorus Total47 ug/L
Unregulated
PFAS (5 compounds detected)
Microplastics (not routinely tested)

Water systems serving Kewaskum

KEWASKUM WATERWORKS

4,309 servedGroundwater12 contaminants2 above guidelines
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Other cities in Washington County

Water quality reports for nearby Wisconsin communities.

AllentonColgateGermantownHartfordJacksonSlingerWest Bend

Frequently asked questions

Is Kewaskum, WI tap water safe to drink?
Kewaskum 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, Arsenic, Copper, Total Trihalomethanes. 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 Kewaskum water?
Monitoring has detected 12 contaminants in Kewaskum's water supply: Lead, Nitrate, Arsenic, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, PFHpA (Perfluoroheptanoic Acid), Fluoride, Thallium, Barium, Phosphorus Total. 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 Kewaskum water have PFAS?
Yes. 5 PFAS compounds have been detected in Kewaskum'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 Kewaskum water hard?
Yes. Kewaskum water has a hardness of 580 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 Kewaskum get its drinking water?
Kewaskum'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. Kewaskum is served by one water system: KEWASKUM WATERWORKS.

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