About the area
Wannon Water’s region extends over 23,500 km2 from the South Australian border in the west, to Balmoral in the north, to Lismore in the east and to the lower Gellibrand River catchment on the south coast.
The City of Warrnambool, Corangamite Shire, Glenelg Shire, Moyne Shire and Southern Grampians Shire local government areas are all within its service area.
Most of Wannon Water’s supply systems provide for both towns and rural customers and are shown as combined systems.
More information on the water corporation can be found at Wannon
2024-25 overview
Urban deliveries
11,862 ML of urban residential and non-residential deliveries were made in 2024-25, similar to the previous year (11,034 ML).
Wastewater recycled at treatment plants
18% of wastewater was recycled (1,767 ML of 9,809 ML), similar to 19% in 2023-24.
Water deliveries
Combined systems
Wannon Water operates 15 water supply systems, including 4 sourced from surface water, 10 from groundwater and one from both. Surface water is sourced from the Glenelg and Otway Coast basins.
Outflows marked as pipeline typically represent rural customers.
Table 1: Combined system water balance, Wannon Water
Recycled water
Water recycled at wastewater treatment plants can be used to supplement water available in river basins. Table 2 lists the wastewater treatment plants managed by Wannon Water. Water discharged to the environment from treatment plants is included as an inflow to the water balance for each of the river basins.
More information can be found in How we account for water supply.
