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Water Quality Report

Cassville, WI

Grant County · 817 residents · 2 water systems

12

Contaminants detected

0

PFAS compounds

230

Hardness (mg/L)

1

Above legal limits

3

Above health guidelines

Cassville drinking water comes from groundwater wells. Based on the most recent monitoring data, 12 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 8 others. PFAS testing has been conducted with no detections. Water hardness is 230 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Cassville water

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

Lead0.0151 / 0.015 mg/L
101% of EPA limit
Nitrate2.1 / 10 mg/L
21% of EPA limit
Arsenic0.001 / 0.01 mg/L
10% of EPA limit
Copper547 / 1300 ug/L
42% of EPA limit
Total Trihalomethanes18.8 / 80 ug/L
24% of EPA limit
Haloacetic Acids (HAA5)29.1 / 60 ug/L
48% of EPA limit
Atrazine0.0081 / 3 ug/L
0% of EPA limit
Selenium0.002 / 0.05 mg/L
4% of EPA limit
Fluoride0.7 / 4 mg/L
18% of EPA limit
Beryllium0.00013 / 0.004 mg/L
3% of EPA limit
Thallium0.0002 / 0.002 mg/L
10% of EPA limit
Barium0.105 / 2 mg/L
5% of EPA limit
PFAS (tested — none detected)
Microplastics (not routinely tested)

Water systems serving Cassville

CASSVILLE WATERWORKS

777 servedGroundwater12 contaminants1 above legal limit2 above guidelines
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BLUFFSIDE COURT

40 servedGroundwater0 contaminants1 above guideline
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Other cities in Grant County

Water quality reports for nearby Wisconsin communities.

BagleyBloomingtonBlue RiverBoscobelCuba CityDickeyvilleFennimoreHazel GreenKielerLancasterLivingstonMontfort

Frequently asked questions

Is Cassville, WI tap water safe to drink?
Cassville tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 3 above independent health guidelines. 12 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, Total Trihalomethanes. 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 Cassville water?
Monitoring has detected 12 contaminants in Cassville's water supply: Lead, Nitrate, Arsenic, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), Atrazine, Selenium, Fluoride, Beryllium, Thallium, Barium. 1 of these are above EPA legal limits. 3 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Cassville water have PFAS?
Cassville'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 Cassville water hard?
Yes. Cassville water has a hardness of 230 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 Cassville get its drinking water?
Cassville'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. Cassville is served by 2 water systems, the largest being CASSVILLE WATERWORKS (serving 777 people).

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