Blue-green algae

Blue-green algae outbreaks occur in the Barwon River through Geelong most often during warmer weather. During blue-green algae outbreaks, the river is closed to in-water activities.

Outbreaks on the Barwon River are the result of a combination warm weather, low water flows and high nutrient levels in the water.

Blue-green algae can range in colour from dark green to yellowish brown and the blooms, which are visible to the naked eye, develop a paint-like consistency when they dry on river banks.

However, blue-green algae toxins are colourless and odourless and can remain at dangerous levels in water even after the blooms have disappeared.

People and their pets should avoid contact with the water during an outbreak. Contact with blue-green algae can cause skin rashes, eye and ear infections, vomiting and diarrhoea, mouth ulcers, sore throat and asthma symptoms.

Look out for signs along the river if there's a blue-green algae outbreak. We will also provide information on any outbreak on the Corangamite CMA website.

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