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Water hardness

Water hardness is the concentration of calcium and magnesium salts in the water supply.

User manuals for new appliances sometimes recommend that you check water hardness levels in your water supply before connecting them.

The below table provides water hardness results during the 2019/20 financial year for the area previously serviced by Western Water. For more information please see the related Water Quality Report.

Water districtAverage hardness (mg/L)Average German Hardness
Bulla171.0
Darley834.6
Diggers Rest150.8
Eynesbury130.7
Gisborne543.0
Lancefield593.3
Lerderderg804.5
Macedon402.2
Maddingley814.5
Melton South120.7
Merrimu874.9
Mount Macedon412.3
Myrniong1156.4
Riddells Creek372.1
Rockbank110.6
Romsey613.4
Sunbury140.8
Toolern Vale884.9
Woodend291.6