Blue green algae Red Alert warning lifted for parts of the lower Murray River

 In Outages & Alerts


13 May 2021

High-level algal warnings (Red Alert) at Euston Weir, Mt Dispersion, Buronga, Merbein, Wentworth and Fort Courage along the lower Murray River have been lifted. However, Colignan and Curlwaa remain on Red Alert due to high densities of blue green algae.

Blue-green algae occur naturally and can reproduce quickly in favourable conditions where there is still or slow-flowing water, abundant sunlight and sufficient levels of nutrients.

Blue-green algae usually appear as green paint-like scums on the water, near the edges, or as greenish clumps throughout the water. It makes the water appear dirty, green or discoloured and generally has a strong musty or earthy odour.

People who believe they may have been affected by blue-green algae are advised to seek medical advice.

Updates about blue-green algae blooms and red level warning areas can be obtained by calling 1800 999 457 or visiting –


Media Contact – Angela Davies – 0467 947 426

General inquiries – Elizabeth Symes – 0439 199 077

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