Residents advised to avoid water contact at Lake Tom Thumb and Lake Weerona

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Routine monitoring has detected high levels of potentially toxic blue-green algae at Lake Weeroona and Lake Tom Thumb.

Blue-green algae also remain present in other lakes across Greater Bendigo.

Blue-green algae occur naturally and can be dangerous to humans and animals.  Contact with algae can cause skin rashes or itchiness, sore eyes, ears and nose or, if swallowed, nausea and vomiting.

City of Greater Bendigo Environmental Health and Local Laws Manager Susannah Milne said warm temperatures and a lack of water flowing into the lakes had created ideal conditions for algal blooms.

“Visitors to Lake Weeroona and Lake Tom Thumb should obey the warning signs at both sites and avoid contact with the water,” Ms Milne said.

“Activities that don’t involve direct contact with water can still be enjoyed, but people who come into contact with the water should wash their skin immediately in clean water.

“Residents should also keep their dogs on a lead at all times to stop them from entering the water.”

The City will continue to closely monitor blue-green algae levels in Greater Bendigo lakes.

Most blue-green algae blooms do not last long; often disappearing after a few weeks, however, when conditions remain favourable, blooms can last longer. It is therefore not known how long algae will remain at high levels.

Regular updates on blue-green algae alerts are available at


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