Blue-green algae Red Alert warning lifted – Mt Dispersion and downstream from Merbein to Lock 9


February 4, 2021


The high-level algal warning (Red Alert) for the lower Murray River downstream from Merbein to Lock 9 has been cleared. Upstream the high alert warning at Mt Dispersion has also been lifted. Monitoring conducted by WaterNSW and Lower Murray Water has shown that concentrations of blue-green algae have declined prompting the lifting of Red Alerts.


However, a high alert remains current for lower Murray River for the reach of river from Colignan to Merbein. BGA in this section of the river remains persistent with high densities detected in surface waters.


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 alert level warning areas can be obtained by calling 1800 999 457 or visiting http://www.waternsw.com.au/water-quality/algae


General inquiries – Elizabeth Symes – 0439 199 077

Media Contact – Tony Webber – 0428 613 478