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Water Quality Report

Waldo, WI

St Croix County · 500 residents · 1 water system

13

Contaminants detected

0

PFAS compounds

310

Hardness (mg/L)

1

Above legal limits

2

Above health guidelines

Waldo drinking water comes from groundwater wells. Based on the most recent monitoring data, 13 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 9 others. Water hardness is 310 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Waldo water

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

Lead0.00035 / 0.015 mg/L
2% of EPA limit
Nitrate0.87 / 10 mg/L
9% of EPA limit
Arsenic0.0018 / 0.01 mg/L
18% of EPA limit
Copper1.8 / 1.3 mg/L
139% of EPA limit
Radium1.5 / 5 pCi/L
29% of EPA limit
Uranium0.013 / 30 ug/L
0% of EPA limit
Total Trihalomethanes11.4 / 80 ug/L
14% of EPA limit
7% of EPA limit
Nickel0.00074 mg/L
UnregulatedInorganic
Xylenes3 / 10000 ug/L
0% of EPA limit
Ethylbenzene0.38 / 700 ug/L
0% of EPA limit
Barium0.1337 / 2 mg/L
7% of EPA limit
Fluoride0.24 / 4 mg/L
6% of EPA limit
Microplastics (not routinely tested)

Other cities in St Croix County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Waldo, WI tap water safe to drink?
Waldo tap water has 1 contaminant 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, Nitrate, Arsenic, Copper, Radium. 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 Waldo water?
Monitoring has detected 13 contaminants in Waldo's water supply: Lead, Nitrate, Arsenic, Copper, Radium, Uranium, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Xylenes, Ethylbenzene, Barium, Fluoride. 1 of these are above EPA legal limits. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Is Waldo water hard?
Yes. Waldo water has a hardness of 310 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 Waldo get its drinking water?
Waldo'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. Waldo is served by one water system: WALDO WATERWORKS.

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