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Water Quality Report

Williams Bay, WI

Walworth County · 2,601 residents · 1 water system

9

Contaminants detected

0

PFAS compounds

78

Hardness (mg/L)

0

Above legal limits

2

Above health guidelines

Williams Bay drinking water comes from groundwater wells. Based on the most recent monitoring data, 9 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 5 others. Water hardness is 78 mg/L (moderately hard), which is within a typical range for the region.

Contaminants detected in Williams Bay water

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

Lead0.0065 / 0.015 mg/L
43% of EPA limit
Nitrate0.1 / 10 mg/L
1% of EPA limit
Arsenic0.0018 / 0.01 mg/L
18% of EPA limit
Copper80 / 1300 ug/L
6% of EPA limit
Total Trihalomethanes1 / 80 ug/L
1% of EPA limit
Haloacetic Acids (HAA5)0.89 / 60 ug/L
1% of EPA limit
Fluoride0.65 / 4 mg/L
16% of EPA limit
Nitrite0.2 / 1 mg/L
20% of EPA limit
Barium0.023 / 2 mg/L
1% of EPA limit
Microplastics (not routinely tested)

Water systems serving Williams Bay

WILLIAMS BAY WATERWORKS

2,601 servedGroundwater9 contaminants2 above guidelines
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Other cities in Walworth County

Water quality reports for nearby Wisconsin communities.

DarienDelavanEast TroyElkhornFontanaGenoa CityLake GenevaPell LakeSharonTroy CenterWalworthWhitewater

Frequently asked questions

Is Williams Bay, WI tap water safe to drink?
Williams Bay 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. 9 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 Williams Bay water?
Monitoring has detected 9 contaminants in Williams Bay's water supply: Lead, Nitrate, Arsenic, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), Fluoride, Nitrite, Barium. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Where does Williams Bay get its drinking water?
Williams Bay'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. Williams Bay is served by one water system: WILLIAMS BAY WATERWORKS.

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