WaterNSW has issued a Red Alert warning for high levels of potentially toxic blue-green algae for Lake
Yarrunga, from Bendeela to the Bundanoon Creek arm and Yarrunga Creek arm of the lake. The alert has
been put in place based on visual observation.
The Red Alert warning applies only to untreated water and will remain in place until monitoring confirms
that the risk is sufficiently diminished.
People should avoid recreational activities such as swimming, water skiing, canoeing or any other activity
that brings them into direct physical contact with this water body until the red alert warning is lifted.
People should avoid consuming untreated water from this stretch of river and prevent pets and livestock
from drinking the water.
Potentially toxic blue-green algae may cause gastroenteritis if consumed, while contact can cause skin
and eye irritations. Consumption of water containing algal toxins may cause liver damage and other health
problems. People who suspect they have been affected by blue-green algae should seek medical advice,
and pets and livestock should be kept from drinking affected water. Boiling water does not inactivate algal
toxins.
People should not eat mussels or crayfish from red alert warning areas. A precautionary approach to
eating fin fish from red alert warning areas is advised. Any fish caught should be cleaned and washed
thoroughly in uncontaminated water; the internal organs should not be eaten. Avoiding fishing during a
bloom is the best way to minimise risk.
Blue-green algae are naturally occurring and can reproduce quickly in still or slow-flowing water when
there are abundant sunlight and sufficient nutrients.
Water users should be aware of the risks associated with entering any waterway in NSW. These waters are
untreated, their quality is unknown, and conditions can change rapidly. Always exercise caution and assess
the risks. All untreated water should be considered unsuitable for potable use.
Visit the Shoalhaven Water website for information about the management of blue-green algae risks in the
nearby treated drinking water supplies.
