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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 2014/15 financial year. For more information please see our Water Quality Report.

Water district
Mean hardness (mg/L)
Mean German hardness
Bulla 89 5.0
Darley 118 6.6
Diggers Rest 92 5.2
Eynesbury 128
7.2
Gisborne 92 5.2
Lancefield 83 4.6
Lerderderg 118 6.6
Macedon 97 5.4
Maddingley 120 6.7
Melton South 114 6.4
Merrimu 128 7.2
Mount Macedon 101 5.7
Myrniong 143 8.0
Riddells Creek 97 5.4
Rockbank 115 6.4
Romsey 76 4.3
Sunbury 92 5.2
Toolern Vale 128 7.2
Woodend 31 1.7

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