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Byron Shire
February 29, 2024

Clarrie Hall Dam red alert for blue-green algae

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Tweed Shire Council is having a run of bad blue-green algae luck – after announcing yesterday that there was an amber alert for the Tweed River at Uki and Bray Park Weir, and last week’s amber alert for Clarrie Hall Dam, Council has today issued a red alert for blue-green algae at Clarrie Hall Dam following its latest water test results.

A red alert means the water should be treated as toxic to both humans and animals and should not be consumed without being treated. It is also potentially unsafe to come into contact with the water.

Council’s Manager Water and Wastewater Operations Brie Jowett said the blue-green algal bloom at the dam is increasing rapidly.

‘While there is no musty odour to the dam water or visible clumps of scum, our test results indicate blue-green algae levels are at the highest red alert level.’

Signs have been placed at popular recreational access points to warn the public of the risks. Residents and stockholders along Doon Doon Creek should also be aware of the potential risks.

No swimming or other water sports

A red alert indicates that people should not undertake recreational activities where they may come into direct contact with the water, such as swimming or water sports. Contact with the water may also pose a threat to livestock and pets.

Water treated at Council’s treatment plants at Uki, Tyalgum and Bray Park remains safe to drink. Council’s water treatment processes are designed to remove any potential toxin from blue-green algae. Treatment also removes any taste and odour compounds from the water.

Council will increase testing to monitor the algal blooms and adjust its treatment processes as required to ensure the Tweed’s drinking water remains safe to drink and pleasant tasting.

Blue-green algae occur naturally and can reproduce quickly in favourable conditions.

Anyone who thinks they may have been in contact with blue-green algal water is advised to seek medical advice if symptoms appear.

For the latest, visit Council’s website at www.tweed.nsw.gov.au/waterandwastewater

For more information on blue-green algae, visit www.waternsw.com.au/water-quality/algae

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