Skip to content

Water Quality Report

Sparta, WI

Monroe County · 10,025 residents · 1 water system

16

Contaminants detected

0

PFAS compounds

190

Hardness (mg/L)

0

Above legal limits

3

Above health guidelines

Sparta 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, Arsenic, Copper, and 12 others. PFAS testing has been conducted with no detections. Water hardness is 190 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Sparta water

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

Lead0.0014 / 0.015 mg/L
9% of EPA limit
Nitrate5.8 / 10 mg/L
57% of EPA limit
Arsenic0.0016 / 0.01 mg/L
16% of EPA limit
Copper68.2 / 1300 ug/L
5% of EPA limit
Radium2.1 / 5 pCi/L
42% of EPA limit
Uranium0.571 / 30 ug/L
2% of EPA limit
Gross Alpha Radiation3.8 / 15 pCi/L
26% of EPA limit
Total Trihalomethanes10.5 / 80 ug/L
13% of EPA limit
Atrazine0.023 / 3 ug/L
1% of EPA limit
Nickel0.0041 mg/L
UnregulatedInorganic
Selenium0.0024 / 0.05 mg/L
5% of EPA limit
Fluoride0.757 / 4 mg/L
19% of EPA limit
Chloromethane1.5 ug/L
UnregulatedVOC
Bromomethane2.9 ug/L
UnregulatedVOC
Thallium0.00016 / 0.002 mg/L
8% of EPA limit
Barium0.0559 / 2 mg/L
3% of EPA limit
PFAS (tested — none detected)
Microplastics (not routinely tested)

Other cities in Monroe County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Sparta, WI tap water safe to drink?
Sparta 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, Arsenic, Copper, Radium. 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 Sparta water?
Monitoring has detected 16 contaminants in Sparta's water supply: Lead, Nitrate, Arsenic, Copper, Radium, Uranium, Gross Alpha Radiation, Total Trihalomethanes, Atrazine, Nickel, Selenium, Fluoride, Chloromethane, Bromomethane, Thallium, Barium. 3 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Sparta water have PFAS?
Sparta'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 Sparta water hard?
Yes. Sparta 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 Sparta get its drinking water?
Sparta'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. Sparta is served by one water system: SPARTA WATERWORKS.

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.