Skip to content

Water Quality Report

Fond Du Lac, WI

Fond du Lac County · 46,472 residents · 6 water systems

17

Contaminants detected

1

PFAS compounds

370

Hardness (mg/L)

4

Above legal limits

6

Above health guidelines

Fond Du Lac drinking water comes from groundwater wells. Based on the most recent monitoring data, 17 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 13 others. PFAS compounds have been detected at trace levels in Fond Du Lac water. Water hardness is 370 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Fond Du Lac water

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

Lead0.0079 / 0.015 mg/L
53% of EPA limit
Nitrate0.08 / 10 mg/L
1% of EPA limit
Arsenic0.0022 / 0.01 mg/L
22% of EPA limit
Copper5.3 / 1300 ug/L
0% of EPA limit
Radium13.8 / 5 pCi/L
150% of EPA limit
Uranium0.363 / 30 ug/L
1% of EPA limit
Gross Alpha Radiation41.3 / 15 pCi/L
150% of EPA limit
Total Trihalomethanes33.6 / 80 ug/L
42% of EPA limit
Haloacetic Acids (HAA5)7.5 / 60 ug/L
12% of EPA limit
Nickel0.0018 mg/L
UnregulatedInorganic
Selenium0.0024 / 0.05 mg/L
5% of EPA limit
Mercury (inorganic)0.000029 / 0.002 mg/L
1% of EPA limit
Barium0.044 / 2 mg/L
2% of EPA limit
Fluoride0.46 / 4 mg/L
12% of EPA limit
Toluene0.25 / 1000 ug/L
0% of EPA limit
Dibromomethane0.95 ug/L
UnregulatedVOC
Lithium12 ug/L
Unregulated
PFAS (1 compounds detected)
Microplastics (not routinely tested)

Water systems serving Fond Du Lac

FOND DU LAC WATERWORKS

44,303 servedGroundwater17 contaminants2 above legal limits2 above guidelines
View →

ASHWOOD GROVE EDGEWATER

1,046 servedGroundwater0 contaminants1 above guideline
View →

FOND DU LAC TN WATER UTILITY

980 servedGroundwater6 contaminants1 above guideline
View →

MARY HILL PARK SANITARY DIST

65 servedGroundwater24 contaminants2 above legal limits1 above guideline
View →

COLONIAL GARDENS HOMES

48 servedGroundwater0 contaminants
View →

ELMORE HEIGHTS TRAILER COURT

30 servedGroundwater0 contaminants1 above guideline
View →

Other cities in Fond du Lac County

Water quality reports for nearby Wisconsin communities.

BrandonCampbellsportFairwaterMt CalvaryNorth Fond Du LacOakfieldRiponSt Cloud

Frequently asked questions

Is Fond Du Lac, WI tap water safe to drink?
Fond Du Lac tap water has 4 contaminants currently measured above EPA legal standards (Maximum Contaminant Levels), and 6 above independent health guidelines. 17 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 Fond Du Lac water?
Monitoring has detected 17 contaminants in Fond Du Lac's water supply: Lead, Nitrate, Arsenic, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Selenium, Mercury (inorganic), Barium, Fluoride, Toluene, Dibromomethane, Lithium. Additionally, 1 PFAS compounds have been detected at trace levels. 4 of these are above EPA legal limits. 6 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Fond Du Lac water have PFAS?
Yes. 1 PFAS compounds have been detected in Fond Du Lac'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.
Is Fond Du Lac water hard?
Yes. Fond Du Lac water has a hardness of 370 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 Fond Du Lac get its drinking water?
Fond Du Lac'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. Fond Du Lac is served by 6 water systems, the largest being FOND DU LAC WATERWORKS (serving 44,303 people).

Check your water quality

Enter your address for a detailed report specific to your water system.

On a private well? Search your address for nearby groundwater monitoring data.