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Water Quality Report

Marathon City, WI

Marathon County · 1,695 residents · 1 water system

9

Contaminants detected

4

PFAS compounds

—

Hardness (mg/L)

0

Above legal limits

1

Above health guidelines

Marathon City 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, Copper, Total Trihalomethanes, and 5 others. PFAS compounds have been detected at trace levels in Marathon City water.

Contaminants detected in Marathon City water

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

Lead0.00036 / 0.015 mg/L
2% of EPA limit
Nitrate3.2 / 10 mg/L
32% of EPA limit
Copper19 / 1300 ug/L
1% of EPA limit
Total Trihalomethanes46.3 / 80 ug/L
58% of EPA limit
Haloacetic Acids (HAA5)9.4 / 60 ug/L
16% of EPA limit
Atrazine0.02 / 3 ug/L
1% of EPA limit
Fluoride0.537 / 4 mg/L
13% of EPA limit
Metolachlor0.014 ug/L
UnregulatedVOC
Barium0.055 / 2 mg/L
3% of EPA limit
PFAS (4 compounds detected)
Microplastics (not routinely tested)

Water systems serving Marathon City

MARATHON CITY WATERWORKS

1,695 servedGroundwater9 contaminants1 above guideline
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Other cities in Marathon County

Water quality reports for nearby Wisconsin communities.

AbbotsfordAthensColbyEdgarHatleyKronenwetterMosineeRothschildSchofieldSpencerStratfordWausau

Frequently asked questions

Is Marathon City, WI tap water safe to drink?
Marathon City 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. 9 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5). 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 Marathon City water?
Monitoring has detected 9 contaminants in Marathon City's water supply: Lead, Nitrate, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), Atrazine, Fluoride, Metolachlor, Barium. Additionally, 4 PFAS compounds have been detected at trace levels. 1 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Marathon City water have PFAS?
Yes. 4 PFAS compounds have been detected in Marathon City'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 Marathon City get its drinking water?
Marathon City'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. Marathon City is served by one water system: MARATHON CITY WATERWORKS.

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