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Water Quality Report

Tomahawk, WI

Lincoln County · 3,180 residents · 1 water system

13

Contaminants detected

9

PFAS compounds

82

Hardness (mg/L)

0

Above legal limits

1

Above health guidelines

Tomahawk drinking water comes from groundwater wells. Based on the most recent monitoring data, 13 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, and 9 others. PFAS compounds have been detected at trace levels in Tomahawk water. Water hardness is 82 mg/L (moderately hard), which is within a typical range for the region.

Contaminants detected in Tomahawk water

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

Lead0.0018 / 0.015 mg/L
12% of EPA limit
Nitrate1.9 / 10 mg/L
19% of EPA limit
Copper230 / 1300 ug/L
18% of EPA limit
Radium0.676 / 5 pCi/L
14% of EPA limit
Uranium0.073 / 30 ug/L
0% of EPA limit
Atrazine0.0061 / 3 ug/L
0% of EPA limit
Fluoride0.3 / 4 mg/L
8% of EPA limit
Barium0.03 / 2 mg/L
2% of EPA limit
PFHpA (Perfluoroheptanoic Acid)6.2 ng/L
UnregulatedPFAS
PFBA (Perfluorobutanoic Acid)0.0058 ug/L
UnregulatedPFAS
Pfpea0.0065 ug/L
Unregulated
Pfhpa0.0065 ug/L
Unregulated
Pfhxa0.0073 ug/L
Unregulated
PFAS (9 compounds detected)
Microplastics (not routinely tested)

Other cities in Lincoln County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Tomahawk, WI tap water safe to drink?
Tomahawk tap water meets EPA legal standards (Maximum Contaminant Levels). However, 1 contaminant is present above independent health guidelines, which are often stricter than legal limits. 13 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Radium, Uranium. 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 Tomahawk water?
Monitoring has detected 13 contaminants in Tomahawk's water supply: Lead, Nitrate, Copper, Radium, Uranium, Atrazine, Fluoride, Barium, PFHpA (Perfluoroheptanoic Acid), PFBA (Perfluorobutanoic Acid), Pfpea, Pfhpa, Pfhxa. Additionally, 9 PFAS compounds have been detected at trace levels. 1 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Tomahawk water have PFAS?
Yes. 9 PFAS compounds have been detected in Tomahawk'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 Tomahawk get its drinking water?
Tomahawk'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. Tomahawk is served by one water system: TOMAHAWK WATERWORKS.

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