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Water Hardness Scale

Here you will find the brief table of the 5 water hardness scale that describes how the water hardness classified into levels.

Water Hardness in Mg/L or PPMWater Hardness Grains/GalWater Hardness Scale
0 – 17.10 – 1Soft
17.1 – 601 – 3.5Slightly hard
60 – 1203.5 – 7.0Moderately hard
120 – 1807.0 – 10.5Hard
from 180from 10.5Very Hard