Zone 6 Water Trade — Vic Murray (Above Choke)

Zone 6 is the Victorian Murray trading zone above the Barmah Choke, covering the Murray River system upstream of the natural constriction near Barmah, Victoria. It is administered under Victorian water law through the Victorian Water Register. Water shares in Zone 6 include high-reliability and low-reliability classes used by dairy farms, horticulture operations and broadacre irrigators.

The Barmah Choke is a natural constriction in the Murray River where the floodplain narrows near Barmah, Victoria. It limits how much water can physically flow downstream at any one time — typically around 8,000 megalitres per day. Zone 6 sits above the Choke, meaning local water delivery is not constrained by the bottleneck. However, the Choke affects how much water can be traded downstream to Zone 7 and other downstream zones, which shapes broader market dynamics.

Zone 6 follows Victorian carryover rules, which are the most generous in the Murray-Darling Basin. Water share holders can carry over up to 100% of unused allocation to the next water year, subject to a volume cap tied to their entitlement class. If dam storage spills, carried-over water may be reduced under Victoria's spillable water rules. Check your specific water share conditions with the Victorian Water Register or Integra.

Yes. Zone 6 water can be traded to other Victorian Murray zones and, through interstate trade protocols, to zones in NSW and SA. Trades downstream to Zone 7 are subject to Barmah Choke delivery constraints. When the Choke is at capacity, downstream trades may be queued or deferred. Integra tracks Choke status daily and can advise on the best window for cross-zone trades.

High-reliability water shares (HRWS) receive allocation first and typically reach 100% in most years. Low-reliability water shares (LRWS) receive allocation only after high-reliability commitments are met and may receive zero allocation in dry years. High-reliability shares are more valuable and more actively traded in Zone 6.

Inter-Valley Transfer (IVT) governs the movement of water between Victorian trading zones. IVT limits are set annually and restrict how much water can move between valleys. When IVT caps are reached, cross-zone trade is effectively suspended until the next water year. IVT availability affects Zone 6 pricing because it determines whether water can move from the Goulburn system into the Murray.

Dairy farms, horticulture operations (stone fruit, citrus, wine grapes) and broadacre irrigators are the main water users in Zone 6. Horticulture creates inelastic demand — growers must water every season or risk losing permanent plantings. Dairy provides consistent summer demand. Broadacre irrigators are more price-elastic and may reduce water use when prices rise.

The Victorian Water Register records all Zone 6 water shares, allocations and trades. Trades are lodged through the register and both parties must hold a valid Victorian water share. Settlement typically takes 2–5 business days. The register charges a transfer fee in addition to any broker fees.

Contact Integra's Zone 6 specialist Giannina DeAngelis directly via the contact details on this page. She will check current bid and offer levels in the Zone 6 market and give you an indicative price within the hour. For large volumes (over 500 ML), it is worth discussing strategy before approaching the market to avoid moving the price against yourself.

Zone 6 (Vic Murray above the Choke) and Zone 7 (Vic Murray below the Choke) can trade at different prices due to the Barmah Choke constraint. When the Choke is at capacity, water cannot easily move from Zone 6 to Zone 7, which can create a price premium below the Choke. In unconstrained periods, the zones tend to trade at similar levels. See the Zone 7 guide and current price pages for a live comparison.