Blue green algae

Page content: Introduction | Management | More information

Introduction

Blue-green algae (cyanobacteria) are bacterial organisms that have some of the characteristics of bacteria and some of algae. They are present in almost all aquatic ecosystems in Australia, including rivers, lakes and estuaries.

Under certain environmental conditions, blue-green algae concentrations in water can rapidly increase and form visible blooms or scums.

Blue-green algae can result in taste and odour issues in water supplies and some species produce toxins that are harmful to humans and animals when they are consumed, inhaled or contact the skin. Water affected by blue-green algae may be unsuitable for drinking, recreational activities such as swimming, fishing and agricultural uses.

Management

There is a statewide coordination plan for blue-green algae in Victoria, with Department of Sustainability and Environment and the Department of Human Services being the primary agencies involved. A regular circular is sent out to all water authorities, local government, catchment management authorities and other agencies which have a role in managing water supplies in Victoria. Further information on the statewide coordination plan and the blue-green algae circular can be obtained from the Our Water Our Future website.

More information

The Cooperative Research Centre for Water Quality and Treatment provides information about blue-green algae and other water quality issues.

Information on managing blue-green algae in farm dams can be obtained from the Department of Primary Industries website.

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