Boost to water security for Sunbury and Diggers Rest

Greater Western Water (GWW) is building two enormous new water tanks in Melbourne’s outer west to increase water security for the growing Sunbury and Diggers Rest region.

The $29 million project is set to begin this week at Sunbury’s Bald Hill. When the work is completed in 2025, the tanks will double the region’s water storage capacity and ultimately supply up to 10,000 properties in the area.

Each steel tank will be nine metres high and 44 metres in diameter and will be able to hold 10 megalitres of water each - the equivalent of four Olympic sized swimming pools worth of water!

A new main will also be constructed to connect the tanks to Melbourne’s water supply.

An artist's impression of the new tanks, that will be painted green to blend in with the environment.

GWW Acting General Manager of Growth and Infrastructure, Bri George said the project will ensure a secure local water supply for decades to come.

“These tanks have been in planning for 10 years to prepare for future water demand so it's a great milestone to start this construction phase,” she said.

“They will double our storage capacity and increase climate resilience by ensuring a reliable source of water for these fast-growing communities to thrive.”

GWW uses multiple drinking water sources to meet demand, cater for a growing population and manage water supplies when inflows are low. Our customers in Sunbury and Diggers Rest are supplied by Rosslynne Reservoir as well as Melbourne’s water supply system.