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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 2018/19 financial year. For more information please see our Water Quality Report.

Water district
Average hardness (mg/L)
Average German Hardness
Bulla 17 1.0
Darley 90 5.0
Diggers Rest 14 0.8
Eynesbury 15 0.8
Gisborne 58 3.2
Lancefield 72 4.0
Lerderderg 83 4.6
Macedon 30 1.7
Maddingley 81 4.5
Melton South 12 0.7
Merrimu 72 4.0
Mount Macedon 30 1.7
Myrniong 124 6.9
Riddells Creek 38 2.1
Rockbank 13 0.7
Romsey 69 3.9
Sunbury 15 0.8
Toolern Vale 75 4.2
Woodend 33 1.8

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