Water Hardness Illinois
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Water Hardness Illinois

Here are the water hardness values for the cities in Illinois.
City AVG Hardness PPM / mg/L AVG Hardness Grains per Gallon
Arlington Heights 134 7.9
Aurora 130 7.7
Aurora 130 7.7
Bolingbrook 108 6.4
Capital 115 6.8
Champaign 90 5.3
Elgin 128 7.5
Elgin 128 7.5
Evanston 134 7.9
Glenview 150 8.8
Joliet 17 1
Joliet 17 1
Mount Prospect 110 6.5
New Trier 150 8.8
Peoria 450 26.4
Rockford 22 1.3
Rockford 22 1.3
Skokie 134 7.9
Springfield 115 6.8
Thornton 196 11.5
Waukegan 140 8.2
Wayne 333.8 19.6
Wheeling 134 7.9