Water Hardness Colorado
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Water Hardness Colorado

Here are the water hardness values for the cities in Colorado.
City AVG Hardness PPM / mg/L AVG Hardness Grains per Gallon
Aurora 132 7.8
Boulder 40.5 2.4
Broomfield 83 4.9
Castle Rock 152 8.9
Centennial 205 12
Colorado Springs 112.5 6.6
Commerce City 276 16.2
Denver 97.5 5.8
Longmont 20 1.2
Loveland 22 1.3
Pueblo 117 6.9
Thornton 196 11.5
Westminster 117.5 6.9