Naperville

DuPage County, Illinois

97 Excellent

Water Quality Score

97/100

Grade

Water Systems

Population

149,540

Key Contaminants

Benzene

4.5478 / 5 μg/L

0 μg/L MCL: 5 μg/L

Gross Alpha Particle Activity

12.018 / 15 pCi/L

0 pCi/L MCL: 15 pCi/L

Radium-226

2.6135 / 5 pCi/L

0 pCi/L MCL: 5 pCi/L

Trichloroethylene (TCE)

2.299 / 5 μg/L

0 μg/L MCL: 5 μg/L

Radium-228

1.9434 / 5 pCi/L

0 pCi/L MCL: 5 pCi/L

Arsenic

3.8437 / 10 μg/L

0 μg/L MCL: 10 μg/L

Selenium

17.1314 / 50 μg/L

0 μg/L MCL: 50 μg/L

Nitrite

0.2376 / 1 mg/L

0 mg/L MCL: 1 mg/L

Water quality can vary by neighborhood in Naperville.