Oak Brook

Oak Brook, IL
IL0430700
People Served
9.4K
Water Source
Surface Water
Counties
DuPage County
Data from
2023
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Contaminants Exceeding Limits

The following contaminants have exceeded the guideline limits at least once in the last year.

  • CO

    Combined Radium (-226 & -228)

    Radium-226 and -228 are radioactive elements that enter water from eroding rock and soil. These naturally occurring contaminants increase the risk of cancer.

    10.880 pci/l
    EPA limit 5.000 pci/l

Other Contaminants Detected

The following contaminants have been detected, but not exceeded the guideline limits in the last year.

Arsenic

Avg:1.350 ppb
Limit:10.000 ppb

Barium

Avg:0.058 ppm
Limit:2.000 ppm

Chromium

Avg:0.004 ppm
Limit:0.100 ppm

Coliform

Avg:1.000 positive samples
Limit:-

Combined Chlorine

Avg:1.100 ppm
Limit:-

Copper

Avg:0.171 ppm
Limit:1.300 ppm
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