Water Hardness Washington
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Water Hardness Washington

Here are the water hardness values for the cities in Washington.
City AVG Hardness PPM / mg/L AVG Hardness Grains per Gallon
Bellevue 21.3 1.3
Burien 21.3 1.3
Kennewick 125 7.4
Kent 73 4.3
Kirkland 21.3 1.3
Lacey 80 4.7
Olympia 53.7 3.2
Redmond 30 1.8
Renton 38.6 2.3
Richland 61.5 3.6
Seattle 21.3 1.3
Shoreline 21.3 1.3
Tacoma 126.8 7.5
Vancouver 96.5 5.7
Yakima 31.2 1.9