Blue-green algae advice downgraded across Gippsland Lakes

The entire Gippsland Lakes system and the ocean are now safe for contact with water. The Blue Green Algae bloom that begun in February this year has now dispersed.

Seafood advisory to remain in place for Gippsland Lakes and Ninety Mile Beach

The Department of Environment, Land, Water and Planning (DELWP), in consultation with the Department of Health (DH), advises not to eat shellfish such as mussels, crabs or prawns from anywhere in the Gippsland Lakes.

Prawns caught in the Gippsland Lakes and up to 5 nautical miles off the Gippsland coast, between McLoughlins Beach to the New South Wales (NSW) border, may contain toxic blue green algae and are not suitable for human consumption. Very high levels of toxins have been reported in seafood samples taken from the Gippsland Lakes.

Remove the guts and gills of fish caught within the Gippsland Lakes and between McLoughlins Beach to Marlo.

Thoroughly wash fish immediately after catching.

The seafood advice will remain in place until test results come back below safe levels, which may take some time.

Can I swim and do other water sports in the Gippsland Lakes?

Yes, the water in the Gippsland Lakes and the Ocean is now safe to come into contact with.

  • Take care not to swallow water during recreation.
  • Do not let your animals/pets drink algae-affected water.

We are doing broad scale water sampling across the Lakes system to monitor algae levels. Algae can grow quickly in the right conditions and situations can change rapidly. As a general rule, it is recommended not to swim in or come into contact with water that has surface scum or looks murky.

Continued algae monitoring

Monitoring and analysis of samples is being conducted on a regular basis to determine the type, amount and extent of algae present. If this species of algae is found at more sites, or other algae of concern, the public will be informed and signs will be put up to warn people not to come into contact with the water.

What is algae?

Cyanobacteria (blue-green algae) are a common seasonal occurrence in Victoria and a natural component of most aquatic systems, including streams, lakes, estuaries and the sea.

Individual cells are very small and are normally not visible in a water body.

But numbers can increase rapidly and blooms, or scums, become easily visible across the water surface.

Blooms can be triggered by nutrient levels, low inflows, lower storage volumes and warmer weather conditions.

Blooms can be unsightly, ranging in colour from dark-green to yellowish-brown. They develop a paint-like consistency as they dry out and often have a pungent smell.

How can algae effect people, animals and dams?

Large numbers of blue-green algae in water bodies can produce toxins that can affect the health of  humans, animals, birds and livestock as well as harm the environment.

In Victoria, blue-green algae is monitored regularly by water corporations and local waterway managers through sampling and testing.

An algae outbreak is managed based on the use of the water body and the density and nature of the bloom.

Farm dams are quite susceptible to algal blooms. Further, they are difficult to reclaim once a bloom has occurred.

It is better to prevent the build-up of predisposing conditions rather than trying to reclaim a contaminated dam.

More information is available on the Agriculture Victoria website

For the latest information on blue-green algae events you should contact the manager responsible for the water body, such as the local council, water corporation or the Department of Environment, Land, Water and Planning.

Further information can be found on the following websites:

The Blue-green Algae Circular informs local water managers about algal bloom coordination within Victoria.

The circular has a bio-volume calculator to determine the level of cell count at which a response may be required. The circular also has a blue-green algae notification form.

The following documents can be accessed via the Water Research Australia website:

  • Blue-green algae: a guide – Fact sheet by the Cooperative Research Centre (CRC) for Water Quality and Treatment on blue-green algae
  • Management strategies for Cyanobacteria (blue-green algae): a guide for water utilities – This guide for water utilities consolidates knowledge on managing blue-green algae. It covers the management of source water, the treatment process, an outline to health effects of blue-green algae and current guidelines and standards.
  • Cyanobacteria: management and implications for water quality – Series of technical fact sheets about  CRC research and management implications for the water industry.
  • Second National Cyanobacterial Workshop – Abstracts and some presentations from the Second National Cyanobacterial Workshop held in Melbourne in 2010.

The following document can be found on the NHMRC website:

  • Guidelines for managing risks in recreational water– National Health and Medical Research Council guidelines to help manage recreational water bodies.

Gippsland Lakes

The Gippsland Lakes contain many different types of algae at varying levels as part of the natural environment and balance of the Lakes system.

Weather conditions, nutrient levels, salinity and water flows all affect the levels of algae and can contribute to the formation of algal blooms on the Lakes.

Warmer weather conditions are likely to lead to a natural increase in the abundance and variety of algae and other organisms in the Lakes.

If an algal bloom develops on the Gippsland Lakes, information (factsheets and maps) will be available on this website and through local outlets, including local media and Visitor Information Centres and circulated to tourism operators. It will also be posted on the DELWP Gippsland Facebook page.

DELWP will resume weekly monitoring and reporting in the summer months unless there are any significant changes to algae levels. Monthly testing will continue until then.

Blue-green algae test results

Page last updated: 20/06/22