Blue green algae alerts for Tabulam and Toonumbar

An Amber Alert has been issued for the benign Cyanocatena sp algae in the Clarence River at Tabulam.
Meanwhile, a Green Alert for the potentially toxic cyanobacteria Planktothrix sp has been issued for downstream of Toonumbar Dam. There are no alerts for the dam itself.
An Amber Alert means that blue-green algae may be multiplying and the water may have a green tinge and musty or organic taste and odour. The water should be considered unsuitable for potable use and alternative supplies or prior treatment of raw water for domestic purposes should be considered. The water may also be unsuitable for stock watering. Generally suitable for water sports, however people are advised to exercise caution in these areas, as blue-green algal concentrations can rise to red alert levels quickly under warm, calm weather conditions.
A Green alert means that blue-green algae is a naturally at low numbers. At these concentrations, algae would not normally be visible, however some species may affect taste and odour of water even at low numbers and does not pose any problems for recreational, stock or household use.
For further information go to the WaterNSW Algal Website http://www.waternsw.com.au/algae or call NSW algae hotline 1800 999 457