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Water Quality Report

Cobb, WI

Iowa County · 458 residents · 1 water system

12

Contaminants detected

0

PFAS compounds

299

Hardness (mg/L)

0

Above legal limits

1

Above health guidelines

Cobb drinking water comes from groundwater wells. Based on the most recent monitoring data, 12 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 8 others. Water hardness is 299 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Cobb water

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

Lead0 / 0.015 mg/L
0% of EPA limit
Nitrate0.01 / 10 mg/L
0% of EPA limit
Arsenic0.001 / 0.01 mg/L
10% of EPA limit
Copper142 / 1300 ug/L
11% of EPA limit
Radium1.5 / 5 pCi/L
31% of EPA limit
Uranium0.36 / 30 ug/L
1% of EPA limit
Gross Alpha Radiation1.4 / 15 pCi/L
9% of EPA limit
6% of EPA limit
21% of EPA limit
Nickel0.0111 mg/L
UnregulatedInorganic
Barium0.0235 / 2 mg/L
1% of EPA limit
Fluoride0.16 / 4 mg/L
4% of EPA limit
Microplastics (not routinely tested)

Other cities in Iowa County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Cobb, WI tap water safe to drink?
Cobb 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. 12 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, Radium. 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 Cobb water?
Monitoring has detected 12 contaminants in Cobb's water supply: Lead, Nitrate, Arsenic, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Barium, Fluoride. 1 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Is Cobb water hard?
Yes. Cobb water has a hardness of 299 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 Cobb get its drinking water?
Cobb'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. Cobb is served by one water system: COBB WATERWORKS.

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