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Illinois Water Hardness

5 cities ranked by hardness.

Joliet

13.2 GPG · 226 ppm
Very Hard

Aurora

12.7 GPG · 217 ppm
Very Hard

Peoria

11.9 GPG · 203 ppm
Very Hard

Springfield

10.8 GPG · 185 ppm
Hard

Chicago

8 GPG · 137 ppm
Hard