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Water Quality Report

Mount Horeb, WI

Dane County · 7,756 residents · 1 water system

16

Contaminants detected

6

PFAS compounds

Hardness (mg/L)

1

Above legal limits

1

Above health guidelines

Mount Horeb drinking water comes from groundwater wells. Based on the most recent monitoring data, 16 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, and 12 others. PFAS compounds have been detected at trace levels in Mount Horeb water.

Contaminants detected in Mount Horeb water

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

Lead0.003 / 0.015 mg/L
20% of EPA limit
Nitrate3.9 / 10 mg/L
39% of EPA limit
Copper5140 / 1300 ug/L
150% of EPA limit
Radium3.4 / 5 pCi/L
68% of EPA limit
Gross Alpha Radiation5.7 / 15 pCi/L
38% of EPA limit
6% of EPA limit
2% of EPA limit
Atrazine0.022 / 3 ug/L
1% of EPA limit
Xylenes0.77 / 10000 ug/L
0% of EPA limit
Fluoride0.6 / 4 mg/L
15% of EPA limit
Methyl Tert Butyl Ether0.77 ug/L
Unregulated
Ethylbenzene0.13 / 700 ug/L
0% of EPA limit
Barium0.0289 / 2 mg/L
1% of EPA limit
Gross Beta6.5 / 50 pCi/L
13% of EPA limit
PFHpA (Perfluoroheptanoic Acid)2.3 ng/L
UnregulatedPFAS
Pfpea0.0044 ug/L
Unregulated
PFAS (6 compounds detected)
Microplastics (not routinely tested)

Other cities in Dane County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Mount Horeb, WI tap water safe to drink?
Mount Horeb tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 1 above independent health guidelines. 16 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, Gross Alpha Radiation. 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 Mount Horeb water?
Monitoring has detected 16 contaminants in Mount Horeb's water supply: Lead, Nitrate, Copper, Radium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Atrazine, Xylenes, Fluoride, Methyl Tert Butyl Ether, Ethylbenzene, Barium, Gross Beta, PFHpA (Perfluoroheptanoic Acid), Pfpea. Additionally, 6 PFAS compounds have been detected at trace levels. 1 of these are above EPA legal limits. 1 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Mount Horeb water have PFAS?
Yes. 6 PFAS compounds have been detected in Mount Horeb'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 Mount Horeb get its drinking water?
Mount Horeb'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. Mount Horeb is served by one water system: MT HOREB WATERWORKS.

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