Major regatta to go ahead despite algae outbreak

THE Corangamite Catchment Management Authority (CCMA) has advised today (Thursday, March 14) the Barwon River is still experiencing an outbreak of blue-green algae.

The CCMA released a statement that Geelong’s arterial river from below Baum’s Weir to the Lower Breakwater is still experiencing signs of the outbreak, which was first detected on February 27 with testing twice weekly, still occurring.

Warning signs remain in place at key access locations along the waterway, advising the public to avoid all contact with the water, but the annual Head of the Schoolgirls regatta will still go ahead from Friday to Sunday this week.

“A combination of hot weather, low water flows and high nutrient levels in the Barwon River have contributed to the outbreak,” the statement said.

“Testing commissioned by the Corangamite CMA on March 6, 2024, and again on March 12, 2024, has shown that high levels of toxic blue green algae continue to be found in multiple sampling locations.

“The Corangamite CMA will continue to conduct water samples and test for blue green algae along the Barwon River in Geelong twice a week.

“Warning signs and health advice will remain in place until two consecutive results confirm levels have fallen below the alert levels across a 7–10-day period.”

CCMA states the decision to proceed with this week’s Head of the Schoolgirls’ rowing regatta on the Barwon River through Geelong was made by event organisers Rowing Victoria.

Until further notice, people and their pets are encouraged to avoid contact with the water.

Contact with blue-green algae can cause skin rashes, eye and ear infections, vomiting and diarrhoea, mouth ulcers, sore throat, and asthma symptoms.

Indirect contact with blue-green algae impacted water can also cause skin irritation, sore eyes, ears and nose, mild respiratory systems, asthma, and anaphylactic reactions.

The CCMA will notify the public once the river is safe for public use.

“The safety of the public is the Authority’s number one priority. Anyone experiencing a reaction should seek medical help,” the statement continued.

“Blue-green algae blooms can be seen with the naked eye across the water surface. However blue-green algae toxins are colourless and odourless and can remain at dangerous levels in water even after the blooms have disappeared.”

For more information or to report a suspected blue-green algae outbreak, contact CCMA on 1800 002 262 or ccma.vic.gov.au.