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Water Quality Report

Oakfield, WI

Fond du Lac County · 1,058 residents · 1 water system

12

Contaminants detected

0

PFAS compounds

324

Hardness (mg/L)

0

Above legal limits

2

Above health guidelines

Oakfield drinking water comes from groundwater wells. Based on the most recent monitoring data, 12 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Radium, and 8 others. PFAS testing has been conducted with no detections. Water hardness is 324 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Oakfield 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
Arsenic0.0003 / 0.01 mg/L
3% of EPA limit
Copper87 / 1300 ug/L
7% of EPA limit
Radium2.2 / 5 pCi/L
45% of EPA limit
Uranium0.09 / 30 ug/L
0% of EPA limit
Gross Alpha Radiation4.1 / 15 pCi/L
27% of EPA limit
Total Trihalomethanes33.5 / 80 ug/L
42% of EPA limit
6% of EPA limit
Nickel0.0029 mg/L
UnregulatedInorganic
Cadmium0.000047 / 0.005 mg/L
1% of EPA limit
Barium0.028 / 2 mg/L
1% of EPA limit
Fluoride0.36 / 4 mg/L
9% of EPA limit
PFAS (tested — none detected)
Microplastics (not routinely tested)

Other cities in Fond du Lac County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Oakfield, WI tap water safe to drink?
Oakfield tap water meets EPA legal standards (Maximum Contaminant Levels). However, 2 contaminants are present above independent health guidelines, which are often stricter than legal limits. 12 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 and how they compare to both legal limits and health guidelines.
What contaminants are in Oakfield water?
Monitoring has detected 12 contaminants in Oakfield's water supply: Lead, Arsenic, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Cadmium, Barium, Fluoride. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Oakfield water have PFAS?
Oakfield's water has been tested for PFAS compounds with no detections. Testing was conducted as part of the EPA's Unregulated Contaminant Monitoring Rule (UCMR5) program.
Is Oakfield water hard?
Yes. Oakfield water has a hardness of 324 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 Oakfield get its drinking water?
Oakfield'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. Oakfield is served by one water system: OAKFIELD WATERWORKS.

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