DuPage County · 156,406 residents · 1 water system
12
Contaminants detected
0
PFAS compounds
—
Hardness (mg/L)
1
Above legal limits
4
Above health guidelines
Naperville drinking water comes from surface water. 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.
Contaminants detected in Naperville water
12 total
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Naperville tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 4 above independent health guidelines. 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, how they compare to both legal limits and health guidelines, and what actions to take.
What contaminants are in Naperville water?
Monitoring has detected 12 contaminants in Naperville's water supply: Lead, Arsenic, Copper, Radium, Uranium, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Selenium, Benzo(a)pyrene, Barium, Fluoride. 1 of these are above EPA legal limits. 4 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Naperville water have PFAS?
Naperville'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.
Where does Naperville get its drinking water?
Naperville's drinking water comes from surface water sources. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Naperville is served by one water system: NAPERVILLE.
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