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Water Quality Report

Hudson, WI

St Croix County · 17,635 residents · 1 water system

17

Contaminants detected

7

PFAS compounds

Hardness (mg/L)

0

Above legal limits

3

Above health guidelines

Hudson 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, Radium, Uranium, and 13 others. PFAS compounds have been detected at trace levels in Hudson water.

Contaminants detected in Hudson water

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

Lead0.0061 / 0.015 mg/L
41% of EPA limit
Nitrate3.8 / 10 mg/L
38% of EPA limit
Radium2.1 / 5 pCi/L
42% of EPA limit
Uranium14 / 30 ug/L
47% of EPA limit
Gross Alpha Radiation6.9 / 15 pCi/L
46% of EPA limit
7% of EPA limit
3% of EPA limit
Atrazine0.022 / 3 ug/L
1% of EPA limit
Nickel0.029 mg/L
UnregulatedInorganic
Selenium0.0032 / 0.05 mg/L
6% of EPA limit
Xylenes1.4 / 10000 ug/L
0% of EPA limit
Fluoride0.79 / 4 mg/L
20% of EPA limit
Toluene0.39 / 1000 ug/L
0% of EPA limit
Ethylbenzene0.34 / 700 ug/L
0% of EPA limit
Antimony0.00037 / 0.006 mg/L
6% of EPA limit
PFBA (Perfluorobutanoic Acid)0.007 ug/L
UnregulatedPFAS
Lithium16 ug/L
Unregulated
PFAS (7 compounds detected)
Microplastics (not routinely tested)

Other cities in St Croix County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Hudson, WI tap water safe to drink?
Hudson tap water meets EPA legal standards (Maximum Contaminant Levels). However, 3 contaminants are present above independent health guidelines, which are often stricter than legal limits. 17 contaminants have been detected in the water supply, including Lead, Nitrate, Radium, Uranium, Gross Alpha Radiation. 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 Hudson water?
Monitoring has detected 17 contaminants in Hudson's water supply: Lead, Nitrate, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Atrazine, Nickel, Selenium, Xylenes, Fluoride, Toluene, Ethylbenzene, Antimony, PFBA (Perfluorobutanoic Acid), Lithium. Additionally, 7 PFAS compounds have been detected at trace levels. 3 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Hudson water have PFAS?
Yes. 7 PFAS compounds have been detected in Hudson'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 Hudson get its drinking water?
Hudson'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. Hudson is served by one water system: HUDSON WATERWORKS.

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