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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 2017/18 financial year. For more information please see our Water Quality Report.

Water district
Average hardness (mg/L)
Average German Hardness
Bulla 18 1.0
Darley 78 4.4
Diggers Rest 15 0.8
Eynesbury 14 0.8
Gisborne 97 5.4
Lancefield 62 3.5
Lerderderg 77 4.3
Macedon 112 6.3
Maddingley 80 4.5
Melton South 20 1.1
Merrimu 28 1.6
Mount Macedon 110 6.2
Myrniong 110 6.2
Riddells Creek 107 6.0
Rockbank 15 0.8
Romsey 67 3.8
Sunbury 16 0.9
Toolern Vale 80 4.5
Woodend 34 1.9

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