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Blue-green algae warning at botanical gardens

Lake Joanna

Friday 5 January 2018

Mount Alexander Shire Council advises residents and visitors of a blue-green algae outbreak in Lake Joanna at the Castlemaine Botanical Gardens.

People are warned to avoid direct contact with the contaminated water. Pet owners are encouraged to keep their pets away from the water.

Signage is in place at Lake Joanna to advise visitors to the gardens to avoid contact with the water.

Blue-green algae occur naturally and the recent hot and dry conditions have contributed to the lake’s current condition. The algae are a natural component of most aquatic systems and are found in streams, lakes, estuaries and the sea.

Algal blooms generally occur in the summer months with the warmer weather.

Significant levels of the algae in water bodies can affect the natural ecosystem and potentially impact on human health.

Direct contact with blue-green algae can cause skin rashes or itchiness, sore eyes, ears and nose or if swallowed gastroenteritis nausea or vomiting. People who come in contact with contaminated water should wash immediately in clean water.

Council will continue to monitor the situation at Lake Joanna, with further tests over the coming weeks.

For more information contact Council’s Customer Service team on 5471 1700.

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