Water Quality Report
Knoxville, IL
Knox County · 3,370 residents · 2 water systems
9
Contaminants detected
0
PFAS compounds
—
Hardness (mg/L)
1
Above legal limits
2
Above health guidelines
Knoxville drinking water comes from groundwater wells. Based on the most recent monitoring data, 9 contaminants have been detected in the water supply, including Lead, Copper, Radium, Uranium, and 5 others.
Contaminants detected in Knoxville 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
Copper460 / 1300 ug/L
35% of EPA limit
Radium5.7 / 5 pCi/L
113% of EPA limit
Uranium0.4761 / 30 ug/L
2% of EPA limit
Total Trihalomethanes48.8 / 80 ug/L
61% of EPA limit
Haloacetic Acids (HAA5)27.7 / 60 ug/L
46% of EPA limit
Selenium0.014 / 0.05 mg/L
28% of EPA limit
Barium0.039 / 2 mg/L
2% of EPA limit
Fluoride2.1 / 4 mg/L
52% of EPA limit
Microplastics (not routinely tested)
Other cities in Knox County
Water quality reports for nearby Illinois communities.
Frequently asked questions
Is Knoxville, IL tap water safe to drink?
Knoxville tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 2 above independent health guidelines. 9 contaminants have been detected in the water supply, including Lead, Copper, Radium, Uranium, 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 Knoxville water?
Monitoring has detected 9 contaminants in Knoxville's water supply: Lead, Copper, Radium, Uranium, Total Trihalomethanes, Haloacetic Acids (HAA5), Selenium, Barium, Fluoride. 1 of these are above EPA legal limits. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Where does Knoxville get its drinking water?
Knoxville's drinking water comes from groundwater wells that draw from underground aquifers. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Knoxville is served by 2 water systems, the largest being KNOXVILLE (serving 3,120 people).
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