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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 2016/17 financial year. For more information please see our Water Quality Report.

Water district
Average hardness (mg/L)
Average German Hardness
Bulla 20 1.1
Darley 54 3.0
Diggers Rest 17 1.0
Eynesbury 19 1.1
Gisborne 84 4.7
Lancefield 76 4.3
Lerderderg 50 2.8
Macedon 76 4.3
Maddingley 47 2.6
Melton South 17 1.0
Merrimu 33 1.8
Mount Macedon 80 4.5
Myrniong 116 6.5
Riddells Creek 75 4.2
Rockbank 17 1.0
Romsey 82 4.6
Sunbury 18 1.0
Toolern Vale 53 3.0
Woodend 36 2.0

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