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 the narrow reach of the Murray River between roughly Yarrawonga and Barmah, Victoria, where the channel constricts. It limits how much water can physically flow downstream at any one time — about 7,000 megalitres per day, and declining. Zone 6 sits above the Choke, meaning local water delivery is not constrained by the bottleneck. But because extra downstream trade would add delivery through the Choke, allocation trade from Zone 6 to Zone 7 has been restricted since 2014 and is effectively closed apart from limited openings — the single most important rule for Zone 6 sellers to understand.

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.

Within the above-Choke market, yes — Zone 6 trades freely with other above-Choke zones such as Zone 10 (NSW Murray above the Choke). Downstream is different: allocation trade from Zone 6 to Zone 7 has been restricted since 2014 and is effectively closed, with only limited openings announced from time to time — it is not simply a queue that clears. This is why below-Choke water carries a structural premium (VWR medians for the week ending 18 July 2026: Zone 7 $425/ML against Zone 6 $325/ML). Trade in the other direction — from Zone 7 up into Zone 6 — remains open. Integra tracks trade opening announcements and can advise whether a downstream trade is currently possible.

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 river systems under trade limits set by Victorian trading rules. Note that the Goulburn-to-Murray IVT does not supply Zone 6 — the Goulburn joins the Murray at Echuca, below the Barmah Choke, so Goulburn water lands in Zone 7 and cannot move upstream into Zone 6 past the Choke. Zone 6 supply comes from the Murray storages (Hume and Dartmouth) and from above-Choke trade. Zone 6 pricing is shaped less by IVT limits and more by the Choke restriction that stops Zone 6 water accessing the below-Choke market.

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) trade at different prices because allocation trade from Zone 6 down to Zone 7 has been restricted since 2014 — effectively closed apart from limited openings. Below-Choke buyers cannot source freely from the above-Choke market, so Zone 7 carries a structural premium: in the week ending 18 July 2026, VWR median prices were $425/ML in Zone 7 against $325/ML in Zone 6. See the Zone 7 guide and current price pages for a live comparison.