Where your water comes from
We manage a complex range of water sources across South West Victoria.
Learn about our water sources
Download our Water Whys information sheet to learn more about our water sources
Water sources and supply systems
We manage a complex range of water sources across our 24,000-square-kilometre region, supplying nearly 12,000 megalitres of drinking water each year. They include shallow bores, deep aquifers, surface catchments and an award-winning roof water harvesting system.
Otway supply system
Our largest and most complex system, providing two-thirds of all our water needs.
Grampians supply system
Our oldest system, dating back to 1900.
Dilwyn Aquifer
This water source stretches across South West Victoria and into South Australia.
Bridgewater Formation Aquifer
Thirty-metre deep bores in the Tullich borefield are used to source water for this supply.
Other water sources
Find out how we supply Penshurst, Caramut, Mortlake, Macarthur and Glenthompson.
Roof water harvesting system
In an average year, our roof water harvesting system collects all the annual water needs of the properties it’s connected to.
Water security
Keeping your water secure in a changing climate
Planning on spraying in our catchment areas?
If you plan on spraying herbicide or pesticide in one of our catchment areas then you need to let us know. It’s quick and easy to notify us via our online form