From 5 January 2017, past reservoir data for Toolondo Reservoir (since 2010) will be updated to reflect the most current bathymetric survey of the lake bed. This detailed survey indicated a greater depth in some parts of the lake than captured by prior reservoir capacity surveys. As a result, a greater volume will now be reported for Lake Toolondo, which recognises the volume in those deeper parts of the lake.
Toolondo Reservoir is an off-stream reservoir that is supplied from a very small catchment of its own via Mt Talbot Creek. Toolondo Reservoir also stores a large quantity of inaccessible water known as ‘dead water’. Its purpose, post construction of the Wimmera Mallee Pipeline, is for water supply via Taylors Lake. Toolondo Reservoir is reliant on transfers from Rocklands Reservoir and provides high recreational value.
The lake is renowned as a trout fishing venue and is also popular with swimmers and water skiers.
There is a private caravan park at this lake.
Toilet facilities are available.
Dogs are not permitted at this lake.
Swimming, water skiing and jet skis are permitted.
Shooting of ducks during duck season is permitted.
Camping is not permitted.
| Current Level | 157.810 m AHD |
| Current Volume | 19,720 ML |
| Percent Full | 39% |
| Current Inflows | -170 ML/week |
| 24 hour Rainfall | 0 mmCummulative Inflows Graph |
| Current Releases | 0 ML/day |
| Current Airspace | 26,500 ML |
| Full Supply Level | 164.93 m AHD |
| Full Supply Volume | 98,260 ML |
| Maximum Operating Level (MOL) | 161.01 m AHD |
| Maximum Operating Volume | 50,530 ML |
| Spillway Volume | No spillway m AHD |
| Outlet Capacity | 360 ML/day |
| Catchment Area | 99 km2 |
| Surface Area When Full | 14 km2 |
| Major Tributary | Mt Talbot Creek |
| Maximum Depth | 11 m |
| Year Constructed | 1953 |