DuPage County · 10,450 residents · 2 water systems
10
Contaminants detected
0
PFAS compounds
—
Hardness (mg/L)
1
Above legal limits
4
Above health guidelines
Oak Brook drinking water comes from a mix of groundwater and surface water sources. Based on the most recent monitoring data, 10 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Radium, and 6 others. PFAS testing has been conducted with no detections.
Contaminants detected in Oak Brook water
10 total
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Oak Brook tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 4 above independent health guidelines. 10 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Radium, 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 Oak Brook water?
Monitoring has detected 10 contaminants in Oak Brook's water supply: Lead, Arsenic, Copper, Radium, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Barium, Chromium (total), Diquat. 1 of these are above EPA legal limits. 4 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Oak Brook water have PFAS?
Oak Brook'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 Oak Brook get its drinking water?
Oak Brook's drinking water comes from a combination of groundwater and surface water sources. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Oak Brook is served by 2 water systems, the largest being OAK BROOK (serving 9,400 people).
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