Small 2025/26 seasonal determination increases for the Murray, Goulburn and Loddon systems
The Resource Manager for northern Victoria today announced an update of 2025/26 seasonal determinations and an updated determination outlook.
The Murray system seasonal determination increases from 39 per cent of high-reliability water shares (HRWS) to 40 per cent HRWS. The Goulburn and Loddon systems increase from 31 per cent HRWS to 33 per cent HRWS.
The Campaspe system remains at 100 per cent HRWS. The Broken and Bullarook systems both remain unchanged at 0 per cent HRWS.
Resource Manager Mark Bailey said the improvements came from small storage inflow increases.
“The flows into the major storages for the Murray, Goulburn and Loddon systems were slightly higher than our estimates, which provided additional water to allocate,” Dr Bailey said.
“The flows into the Broken and Bullarook storages were not enough to increase seasonal determination in those systems.
“More rainfall is needed over the coming months to increase storages levels and seasonal determinations across all systems.”
The seasonal determinations for northern Victorian water systems on Tuesday 15 July are:
| Murray |
40% |
0% |
| Broken |
0% |
0% |
| Goulburn |
33% |
0% |
| Campaspe |
100% |
0% |
| Loddon |
33% |
0% |
| Bullarook |
0% |
0% |
Trading opportunities
Allocation trade from New South Wales to Victoria is limited to the lesser of a net annual volume of 200 GL or a volume that keeps the risk of spill in Victoria’s share of both Hume and Dartmouth reservoirs below 50 per cent. The current risk of spill from Victoria’s share of Hume and Dartmouth allows 200 GL of allocation trade from New South Wales to Victoria. The volume available for trade is updated monthly with each risk of spill announcement.
Upcoming Resource Manager announcements
- The next 2025/26 seasonal determination announcement will be released on Friday, 1 August 2025.
- The risk of spill in the Murray, Goulburn and Campaspe systems will be updated on Monday, 11 August 2025.