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Water Quality Report

Elkhorn, WI

Walworth County · 10,507 residents · 3 water systems

17

Contaminants detected

0

PFAS compounds

220

Hardness (mg/L)

1

Above legal limits

8

Above health guidelines

Elkhorn drinking water comes from groundwater wells. Based on the most recent monitoring data, 17 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 13 others. PFAS testing has been conducted with no detections. Water hardness is 220 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Elkhorn water

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

Lead0.014 / 0.015 mg/L
93% of EPA limit
Nitrate0.28 / 10 mg/L
3% of EPA limit
Arsenic0.005 / 0.01 mg/L
50% of EPA limit
Copper83 / 1300 ug/L
6% of EPA limit
Radium6.3 / 5 pCi/L
127% of EPA limit
Uranium0.022 / 30 ug/L
0% of EPA limit
Gross Alpha Radiation5.8 / 15 pCi/L
39% of EPA limit
Total Trihalomethanes24.9 / 80 ug/L
31% of EPA limit
Haloacetic Acids (HAA5)16.5 / 60 ug/L
28% of EPA limit
Nickel0.0013 mg/L
UnregulatedInorganic
Selenium0.0055 / 0.05 mg/L
11% of EPA limit
Xylenes0.46 / 10000 ug/L
0% of EPA limit
2,4-D0.29 / 70 ug/L
0% of EPA limit
Fluoride0.2 / 4 mg/L
5% of EPA limit
Barium0.3 / 2 mg/L
15% of EPA limit
Phosphorus Total690 ug/L
Unregulated
Orthophosphate2200 ug/L
Unregulated
PFAS (tested — none detected)
Microplastics (not routinely tested)

Water systems serving Elkhorn

ELKHORN WATERWORKS

10,317 servedGroundwater17 contaminants1 above legal limit2 above guidelines
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LUDWELL ESTATES

100 servedGroundwater26 contaminants4 above guidelines
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TOWN HALL APTS

90 servedGroundwater6 contaminants2 above guidelines
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Other cities in Walworth County

Water quality reports for nearby Wisconsin communities.

DarienDelavanEast TroyFontanaGenoa CityLake GenevaPell LakeSharonTroy CenterWalworthWhitewaterWilliams Bay

Frequently asked questions

Is Elkhorn, WI tap water safe to drink?
Elkhorn tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 8 above independent health guidelines. 17 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, Radium. 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 Elkhorn water?
Monitoring has detected 17 contaminants in Elkhorn's water supply: Lead, Nitrate, Arsenic, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Selenium, Xylenes, 2,4-D, Fluoride, Barium, Phosphorus Total, Orthophosphate. 1 of these are above EPA legal limits. 8 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Elkhorn water have PFAS?
Elkhorn's water has been tested for PFAS compounds with no detections. Testing was conducted as part of the EPA's Unregulated Contaminant Monitoring Rule (UCMR5) program.
Is Elkhorn water hard?
Yes. Elkhorn water has a hardness of 220 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 Elkhorn get its drinking water?
Elkhorn'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. Elkhorn is served by 3 water systems, the largest being ELKHORN WATERWORKS (serving 10,317 people).

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