Low water volumes and higher temperatures have led to the growth of the algae in the lake.

Bio-volume levels of 40 cubic millimetres per litre were detected by council staff on Tuesday, October 27.

The red alert warning means people should not come into direct contact with the water, or use it for washing.

Blue-green algae levels may also pose a threat to livestock and pets.

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Griffith City Council will place warning signs around the lake while high levels of the algae are present.

Council says that town water supplies remain unaffected.

Any fish caught should be cleaned and washed thoroughly in uncontaminated water and their internal organs should be disposed of appropriately.

Further updates on algae blooms and red alert levels are available at www.waternsw.com.au/water-quality/algae.

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