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Water Quality Report

Downers Grove, IL

DuPage County · 49,425 residents · 1 water system

12

Contaminants detected

0

PFAS compounds

—

Hardness (mg/L)

0

Above legal limits

2

Above health guidelines

Downers Grove 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 Downers Grove water

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

Lead0.005 / 0.015 mg/L
33% of EPA limit
Arsenic0.0015 / 0.01 mg/L
15% of EPA limit
Copper6.5 / 1300 ug/L
0% of EPA limit
Radium2.7 / 5 pCi/L
55% of EPA limit
Trichloroethylene0.38 / 5 ug/L
8% of EPA limit
44% of EPA limit
26% of EPA limit
Nickel0.0035 mg/L
UnregulatedInorganic
Barium0.164 / 2 mg/L
8% of EPA limit
Chromium (total)0.0023 / 0.1 mg/L
2% of EPA limit
Fluoride0.18 / 4 mg/L
5% of EPA limit
cis-1,2-Dichloroethylene0.5 / 70 ug/L
1% of EPA limit
PFAS (tested — none detected)
Microplastics (not routinely tested)

Other cities in DuPage County

Water quality reports for nearby Illinois communities.

Frequently asked questions

Is Downers Grove, IL tap water safe to drink?
Downers Grove tap water meets EPA legal standards (Maximum Contaminant Levels). However, 2 contaminants are present above independent health guidelines, which are often stricter than legal limits. 12 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Radium, Trichloroethylene. 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 Downers Grove water?
Monitoring has detected 12 contaminants in Downers Grove's water supply: Lead, Arsenic, Copper, Radium, Trichloroethylene, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Barium, Chromium (total), Fluoride, cis-1,2-Dichloroethylene. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Downers Grove water have PFAS?
Downers Grove'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 Downers Grove get its drinking water?
Downers Grove's drinking water comes from surface water sources. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Downers Grove is served by one water system: DOWNERS GROVE.

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