Naperville

Naperville, IL
IL0434670
People Served
155.2K
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.

    25.600 pci/l
    EPA limit 5.000 pci/l
  • TE

    Tetrachloroethylene

    Tetrachloroethylene is an industrial solvent and dry cleaning chemical. It enters water from industrial sites and dry cleaners, causing liver damage and increasing cancer risk.

    7.860 ppb
    EPA limit 5.000 ppb

Other Contaminants Detected

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

Arsenic

Avg:3.960 ppb
Limit:10.000 ppb

Barium

Avg:0.132 ppm
Limit:2.000 ppm

Coliform

Avg:0.800 positive samples
Limit:-

Combined Chlorine

Avg:1.100 ppm
Limit:-

Copper

Avg:0.068 ppm
Limit:1.300 ppm

Fluoride

Avg:1.330 ppm
Limit:4.000 ppm
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