Skip to content

Water Quality Report

Montello, WI

Marquette County · 1,329 residents · 1 water system

10

Contaminants detected

2

PFAS compounds

240

Hardness (mg/L)

0

Above legal limits

1

Above health guidelines

Montello drinking water comes from groundwater wells. Based on the most recent monitoring data, 10 contaminants have been detected in the water supply, including Lead, Nitrate, Radium, Uranium, and 6 others. PFAS compounds have been detected at trace levels in Montello water. Water hardness is 240 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Montello water

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

Lead0.005 / 0.015 mg/L
33% of EPA limit
Nitrate3 / 10 mg/L
30% of EPA limit
Radium0.8379 / 5 pCi/L
17% of EPA limit
Uranium0.192 / 30 ug/L
1% of EPA limit
Gross Alpha Radiation0.258 / 15 pCi/L
2% of EPA limit
Total Trihalomethanes2.5 / 80 ug/L
3% of EPA limit
Haloacetic Acids (HAA5)0.54 / 60 ug/L
1% of EPA limit
Nickel0.0014 mg/L
UnregulatedInorganic
Chromium (total)0.0017 / 0.1 mg/L
2% of EPA limit
Barium0.019 / 2 mg/L
1% of EPA limit
PFAS (2 compounds detected)
Microplastics (not routinely tested)

Water systems serving Montello

MONTELLO WATERWORKS

1,329 servedGroundwater10 contaminants1 above guideline
View →

Other cities in Marquette County

Water quality reports for nearby Wisconsin communities.

Westfield

Frequently asked questions

Is Montello, WI tap water safe to drink?
Montello 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. 10 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 Montello water?
Monitoring has detected 10 contaminants in Montello's water supply: Lead, Nitrate, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Chromium (total), Barium. Additionally, 2 PFAS compounds have been detected at trace levels. 1 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Montello water have PFAS?
Yes. 2 PFAS compounds have been detected in Montello'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.
Is Montello water hard?
Yes. Montello water has a hardness of 240 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 Montello get its drinking water?
Montello'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. Montello is served by one water system: MONTELLO WATERWORKS.

Check your water quality

Enter your address for a detailed report specific to your water system.

On a private well? Search your address for nearby groundwater monitoring data.