Olympia's Water Hardness

Water Hardness: The City of Olympia's drinking water is considered "slightly hard" at 55-60 milligrams per liter (mg/L). The hardness scale is:
Classification
mg/L or ppm* Grains per gallon
Soft
0 - 17.1 0 - 1
Slightly Hard
17.1 - 60 1 - 3.5
Moderately Hard
60 - 120 3.5 - 7.0
Hard
120 - 180 7.0 - 10.5

*parts per millionHardness refers to dissolved minerals (calcium and magnesium) in the water. The hardness of the water can interfere with the sudsing action of soap. The harder the water, the lesser the sudsing action. The water you receive is slightly hard.