In the area previously serviced by Western Water, we use a number of water sources to supply customers.
Having access to multiple sources ensures we can meet demand, cater for a growing population and manage water supplies when inflows are low.
When local supplies are low, or reservoirs are at decreased capacity, supply changes ensure our customers have access to water that is safe, healthy to drink and meets the Australian Drinking Water Guidelines.
When water supply changes take effect, some customers may notice a slight change in taste. Naturally occurring minerals can affect how water tastes, without affecting the water quality.
The below table shows the available and current water sources for each town that Greater Western Water services in the area previously serviced by Western Water. It is subject to change at any time.
| Town | Available sources | Current source | Last change |
Bacchus Marsh & Darley | Merrimu Reservoir Djerriwarrh Reservoir Melbourne supply system | Merrimu Reservoir | May 2019 |
Bulla | Rosslynne Reservoir Melbourne supply system | Melbourne supply system | May 2016 |
Diggers Rest | Rosslynne Reservoir Melbourne supply system | Melbourne supply system | May 2016 |
Gisborne, New Gisborne and Gisborne South | Rosslynne Reservoir Melbourne supply system | Melbourne supply system | March 2021 |
Lancefield* | Lancefield surface water (Garden Hut Reservoir, Lancefield Basin) Lancefield ground water (local bores) Local surface water (Rosslynne Reservoir, Romsey surface water) Melbourne supply system | Lancefield surface water Lancefield ground water Melbourne supply system | March 2021 |
Macedon and Mount Macedon | Rosslynne Reservoir Melbourne supply system | Melbourne supply system | March 2021 |
Melton and Melton South | Merrimu Reservoir Djerriwarrh Reservoir Melbourne supply system | Melbourne supply system Merrimu Reservoir | April 2021 |
Myrniong* | Pykes Creek Reservoir | Pykes Creek Reservoir | N/A |
Riddells Creek | Rosslynne Reservoir Melbourne supply system | Melbourne supply system | March 2021 |
Rockbank | Merrimu Reservoir Djerriwarrh Reservoir Melbourne supply system | Melbourne supply system | June 2016 |
Romsey* | Romsey surface water (Kerrie Reservoir, Wright Reservoir) Romsey ground water (local bore) Rosslynne Reservoir Melbourne supply system | Romsey surface water Melbourne supply system | March 2021 |
Sunbury | Rosslynne Reservoir Melbourne supply system | Melbourne supply system | May 2016 |
Woodend* | Woodend system (Campaspe Reservoir, Graham Brock Reservoir, Reservoir C and Mount Macedon reservoirs) Rosslynne Reservoir Melbourne supply system | Woodend system | November 2019 |
* These towns only receive fluoridated water when supplied with water from outside their normal water source. For example, in times of drought water may come from Melbourne or be brought in from other sources. The long term levels of fluoride during these times are below what is expected from a normal fluoridated water supply. For more information about fluoride, visit the Department of Health and Human Services website or call their hotline on 1300 761 874.