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Water Quality Report

Downsville, WI

Dunn County · 250 residents · 1 water system

13

Contaminants detected

0

PFAS compounds

190

Hardness (mg/L)

2

Above legal limits

2

Above health guidelines

Downsville drinking water comes from groundwater wells. Based on the most recent monitoring data, 13 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Radium, and 9 others. Water hardness is 190 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Downsville water

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

Lead0.001 / 0.015 mg/L
7% of EPA limit
Arsenic0.0023 / 0.01 mg/L
23% of EPA limit
Copper74 / 1300 ug/L
6% of EPA limit
Radium16.1 / 5 pCi/L
150% of EPA limit
Uranium0.157 / 30 ug/L
1% of EPA limit
Gross Alpha Radiation19.8 / 15 pCi/L
132% of EPA limit
13% of EPA limit
9% of EPA limit
Nickel0.0014 mg/L
UnregulatedInorganic
Selenium0.011 / 0.05 mg/L
22% of EPA limit
Mercury (inorganic)0.00006 / 0.002 mg/L
3% of EPA limit
Barium0.03 / 2 mg/L
2% of EPA limit
Fluoride0.24 / 4 mg/L
6% of EPA limit
Microplastics (not routinely tested)

Other cities in Dunn County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Downsville, WI tap water safe to drink?
Downsville tap water has 2 contaminants currently measured above EPA legal standards (Maximum Contaminant Levels), and 2 above independent health guidelines. 13 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Radium, Uranium. View the detailed report for each water system to see specific levels, how they compare to both legal limits and health guidelines, and what actions to take.
What contaminants are in Downsville water?
Monitoring has detected 13 contaminants in Downsville's water supply: Lead, Arsenic, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Selenium, Mercury (inorganic), Barium, Fluoride. 2 of these are above EPA legal limits. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Is Downsville water hard?
Yes. Downsville water has a hardness of 190 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 Downsville get its drinking water?
Downsville'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. Downsville is served by one water system: DOWNSVILLE SANITARY DISTRICT.

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