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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 more information please see our Water Quality Report.

Water district
Average hardness (mg/L)
Average German Hardness
Bulla 17 1.0
Darley 83 4.6
Diggers Rest 15 0.8
Eynesbury 13 0.7
Gisborne 54 3.0
Lancefield 59 3.3
Lerderderg 80 4.5
Macedon 40 2.2
Maddingley 81 4.5
Melton South 12 0.7
Merrimu 87 4.9
Mount Macedon 41 2.3
Myrniong 115 6.4
Riddells Creek 37 2.1
Rockbank 11 0.6
Romsey 61 3.4
Sunbury 14 0.8
Toolern Vale 88 4.9
Woodend 29 1.6

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