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Illinois

Water Quality Report

B

76/100

Average Water Quality Score

2,800

Water Systems

12.7M

Population Served

Cities in Illinois

Score: 68/100 2.7M

WaterQ

Helping you understand your drinking water quality. Based on EPA SDWIS data.

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Data Source

Data provided by the US Environmental Protection Agency (EPA) Safe Drinking Water Information System.
Last Updated: February 2026

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