Blue-green algae Red Alert for Lostock Dam and Paterson River

Blue-green algae Red Alert for Lostock Dam and Paterson River

22 April 2020

A Red Alert level warning (high alert) for blue-green algae has been issued for Lostock Dam and the Paterson River upstream and downstream of the storage. The Red Alert is based on highly concentrated scums observed in the lake and stretches of the Paterson River. The lake is currently spilling which increases the likelihood of downstream impacts relating to the bloom. Samples have been taken and results are pending.

The species of blue-green algae has been identified and are potentially toxic and may cause gastroenteritis in humans if consumed, and skin and eye irritations after contact.

A Red Alert level warning indicates that people should not undertake recreational activities where they may be coming into direct contact with the water such as swimming, as well as domestic uses including showering and washing. Contact with the water may also pose a threat to livestock and pets.

People are advised not to enter the water, not to drink untreated water or bathe in water drawn from the dam while this red alert level warning is in place. Boiling the water does not remove algal toxins. Town water supplies remain unaffected and safe to drink.

Livestock should check stock water supplies for blue-green algae and to remove stock from foreshores where surface scum is visible or blue-green algae are suspected.

People should not eat mussels or crayfish from Red Alert warning areas. Any fish caught should be cleaned and washed thoroughly in uncontaminated water and any internal organs disposed of before consumption.

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.

Blue-green algae occur naturally and can reproduce quickly in favourable conditions where there is still or slow-flowing water, abundant sunlight and sufficient levels of nutrients.

It is not possible to predict how long the algae will remain at high levels. Regular monitoring will continue, and the alert will be lifted as soon as the high levels of algae dissipate.

People who believe they may have been affected by blue-green algae are advised to seek medical advice.

Updates about blue-green algae blooms and red level warning areas can be obtained by calling 1800 999 457 or visiting – http://www.waternsw.com.au/water-quality/algae

Media Contact – Tony Webber – 0428 613 478

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