WaterNSW has issued a Red Alert for high levels of potentially toxic blue-green algae at Malpas Dam, south-east of Guyra.
The alert applies only to untreated water at the identified location and will remain in place until monitoring confirms the risk has eased.
Potentially toxic blue-green algae can cause gastroenteritis if consumed. Contact with affected water may result in skin and eye irritation, while ingestion of algal toxins can lead to liver damage and other health issues. Anyone who believes they may have been affected should seek medical advice. Pets and livestock should be prevented from drinking contaminated water. Boiling water does not deactivate algal toxins.
Blue-green algae occur naturally and can multiply rapidly in still or slow-moving water when sunlight and nutrient levels are high.
WaterNSW advises the public to exercise caution when entering any waterway in NSW. These waters are untreated, water quality can vary, and conditions may change quickly. All untreated water should be regarded as unsuitable for drinking.
For information about the management of blue-green algae risks in treated drinking water supplies, visit your local council or water utility website.
Updates on blue-green algae blooms and Red Alert warning areas are available at www.waternsw.com.au/algae or via WaterInsights.
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