WaterNSW has issued a Red Alert warning for high levels blue-green algae in the Macintyre River at Boggabilla. This alert also extends upstream to the township of Toomelah to downstream of Goondiwindi.

The Red Alert warning applies only to water within the Macintyre River or to water bodies directly connected to the river at these locations.

This alert will remain in place until monitoring and test results confirm that the risk is suIficiently diminished.

People should not consume untreated water from this section of the Macintyre River. Boiling the water will not remove algal toxins. Stock and domestic water users along the Macintyre River are advised to check water supplies for suitably for the intended purpose.

People should avoid recreational activities such as swimming, water skiing, canoeing and any other activity that brings them into contact with this waterbody until the red alert warning is lifted.

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. Boiling the water does not remove 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 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 suspect they have been affected by blue-green algae should seek medical advice.

Blue-green algae is naturally occurring and can reproduce quickly in still or slow-flowing water when there is abundant sunlight and suIficient nutrients.

If there are concerns regarding treated water supplies, visit the local council or local water utility websites for information about the management of blue-green algae in the treated drinking water.

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