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Water Quality Report

Monona, WI

Dane County · 8,624 residents · 1 water system

16

Contaminants detected

8

PFAS compounds

Hardness (mg/L)

0

Above legal limits

3

Above health guidelines

Monona drinking water comes from groundwater wells. Based on the most recent monitoring data, 16 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Tetrachloroethylene, and 12 others. PFAS compounds have been detected at trace levels in Monona water.

Contaminants detected in Monona water

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

Lead0.0028 / 0.015 mg/L
19% of EPA limit
Nitrate4.2 / 10 mg/L
42% of EPA limit
Copper318 / 1300 ug/L
24% of EPA limit
Tetrachloroethylene0.43 / 5 ug/L
9% of EPA limit
19% of EPA limit
3% of EPA limit
Xylenes0.7 / 10000 ug/L
0% of EPA limit
Fluoride0.782 / 4 mg/L
20% of EPA limit
Ethylbenzene0.19 / 700 ug/L
0% of EPA limit
PFHpA (Perfluoroheptanoic Acid)1 ng/L
UnregulatedPFAS
Chromium (total)0.0015 / 0.1 mg/L
1% of EPA limit
Barium0.0667 / 2 mg/L
3% of EPA limit
Dichlorodifluoromethane0.25 ug/L
UnregulatedVOC
PFBA (Perfluorobutanoic Acid)0.011 ug/L
UnregulatedPFAS
Pfpea0.0046 ug/L
Unregulated
Pfhxa0.0042 ug/L
Unregulated
PFAS (8 compounds detected)
Microplastics (not routinely tested)

Other cities in Dane County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Monona, WI tap water safe to drink?
Monona 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. 16 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Tetrachloroethylene, Total Trihalomethanes. 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 Monona water?
Monitoring has detected 16 contaminants in Monona's water supply: Lead, Nitrate, Copper, Tetrachloroethylene, Total Trihalomethanes, Haloacetic Acids (HAA5), Xylenes, Fluoride, Ethylbenzene, PFHpA (Perfluoroheptanoic Acid), Chromium (total), Barium, Dichlorodifluoromethane, PFBA (Perfluorobutanoic Acid), Pfpea, Pfhxa. Additionally, 8 PFAS compounds have been detected at trace levels. 3 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Monona water have PFAS?
Yes. 8 PFAS compounds have been detected in Monona'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 Monona get its drinking water?
Monona'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. Monona is served by one water system: MONONA WATERWORKS.

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