Blue-green algae Red Alert lifted for Lachlan River at Hillston and Booligal

The Red Alerts were lifted following two consecutive laboratory reports for algal samples of lower than red alert level. The Lachlan River at Hillston and Booligal are both now on green alert for blue-green algae.

While on a green alert, blue-green 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, but water users are advised to exercise caution.

It is also advised not to drink untreated or boiled water from the river due to the risk of stomach upsets. Boiling the water does not inactivate algal toxins.

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.

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 will continue routine water quality monitoring and advise of any change as new results are received.

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.

Updates and information about blue-green algae blooms and red level warning areas can be obtained by 1300 662 077 or visiting www.waternsw.com.au/water-quality/algae