Community
28 March, 2025
Algae detected
TWO lakes in Lismore and Derrinallum have been closed for public use following the detection of high levels of blue-green algae.
A Department of Energy, Environment and Climate Action spokesperson said high levels of blue-green algae were detected at Lake Tooliorook in Lismore and Deep Lake in Derrinallum.
There have not been high levels of blue-green algae detected in Lake Bullen Merri.
“Blue-green algae can pose a risk to public health, so we urge people to avoid direct contact with affected water while warning signs remain in place,” the spokesperson said.
“Swimming, fishing and boating, as well as eating whole fish, shellfish or crustaceans from the lakes, should be avoided until algae levels drop to safe levels.
“We will continue weekly water quality testing to monitor changes in blue-green algae levels at Lake Tooliorook and Deep Lake.
“Warning signs will remain in place until tests confirm the waterways are safe for public use.”
Blue-green algae is naturally occurring, with the recent warm weather creating favourable conditions for blooms to develop.
Blue-green algae blooms can produce toxins that can affect the health of humans, animals, birds and livestock.
When blooms are detected, the waterway manager installs warning signs advising people to avoid contact with affected water.
Direct contact with blue-green algae can cause allergic reactions such as skin rashes or itchiness; and sore eyes, ears and nose. If swallowed, it can cause gastroenteritis, nausea or vomiting.
Advice includes:
anyone who comes into contact with contaminated water should immediately wash in fresh water and seek medical advice if they experience any illness;
do not use affected water for drinking, cooking or other domestic uses;
any fish harvested from the lake must have the gills and guts removed prior to cooking; and
pets should not drink or have contact with affected water.
Read More: Lismore, Derrinallum