A Red Alert warning issued on 21 January for high levels of potentially toxic blue-green algae at Lake Menindee has been lowered to an Amber Alert, WaterNSW has advised.
The Red Alert was lifted following two consecutive laboratory algal reports which indicates that Lake Menindee was no longer on red alert for blue-green algae, the water authority said in a statement.
While on Amber Alert, the water is generally considered to be suitable for water sports, but water users are advised to exercise caution. It is also advised not to drink untreated or boiled water from Lake Menindee due to the risk of stomach upsets. Boiling the water does not inactivate algal toxins. The water should be considered unsuitable for potable use and alternative supplies or prior treatment of raw water for domestic purposes should be considered.
As algal numbers can change dramatically with changes in conditions, water users should avoid water which is discoloured or gives off an earthy or musty odour, WaterNSW said.
Water users should use personal discretion at all times before entering a water body and be aware that the algal situation can change quickly. WaterNSW says it will continue routine water quality monitoring and advise of any change as new results are received.
Blue-green algae is naturally occurring and can reproduce quickly in still or slow-flowing water when there is abundant sunlight and sufficient nutrients.
Updates and information about blue-green algae blooms and red level warning areas can be obtained by visiting www.waternsw.com.au/algae or calling 1300 662 077.
