Menindee Lakes restrictions return as storage falls and fish-kill risk rises

What you need to know

• The restrictions were triggered when active storage in the upper Menindee Lakes fell below 250 GL. The NSW Government says this volume represents up to 12 months of supply for critical downstream needs, including town water, basic landholder rights and maintaining connectivity and a healthy lower Darling ecosystem. 23
• The restrictions affect specified water-access licences. The official notice describes their purpose as protecting water for critical needs and ecological conditions, rather than as a response to a confirmed future fish kill. 3
• The Guardian reported that combined Menindee Lakes storage fell below 480 GL in October. It attributed warnings of possible summer fish kills to low inflows and continuing dry conditions. 1
• NSW records show that fish deaths occurred at Lake Menindee in early February 2026, with hundreds of thousands of fish estimated to have died, primarily Bony Herring and Carp. The cause was undetermined; extreme temperatures and receding lake levels were noted as possible influences. 5
• In September, ABC reported concerns about low water levels, poor water quality and algal alerts ahead of summer. The Menindee fishway had reopened for the final season of its trial, but the reporting does not show that the fishway or restrictions have prevented fish deaths. 43

Why this matters

Menindee’s low storage puts both water supply and ecological conditions in the lower Darling-Baaka under pressure. The earlier fish deaths show that losses have occurred, while the prospect of further deaths remains a risk rather than a confirmed outcome. 351

What happens next

The sources do not provide a later storage or inflow update, or say whether restrictions will change. How conditions develop over summer, including whether rainfall and river flows improve and whether the restrictions or fish-passage measures prove effective, remains unresolved. 134

What we know

• The 250 GL trigger applies to storage in the upper Menindee Lakes, and the restrictions took effect on 1 October 2026. 23
• The NSW fish-death record estimates hundreds of thousands of fish died at Lake Menindee in early February 2026, primarily Bony Herring and Carp. 5
• The cause of those February fish deaths was undetermined in the official record. Extreme temperatures and receding lake levels were listed as possible influences. 5

What we don't know

• The sources do not establish the scale or timing of any further fish deaths over summer, or confirm that a large-scale event will occur. 14
• They do not provide the latest combined storage and inflow measurements or show how those figures will change over summer. 12
• The reporting does not establish whether rainfall and river flows will improve enough to ease pressure on the lakes and lower Darling-Baaka, or whether the restrictions and fishway trial will prevent further harm. 34

Read the reporting

This WildNews briefing synthesises and summarises reporting from the sources below. WildNews did not produce the original reporting. Learn more about how we use AI