Algal slicks update

The City is aware of algal slicks affecting portions of Lakes Brearley and Bungana and an increase in midge activity.

Water quality sampling is being undertaken to assess conditions, including algal cell counts and water quality parameters, including blue-green algae, and phosphorous and nitrogen levels. The City's environmental consultant will review the results and provide technical advice on any recommended management actions.

The lakes are treated with a hybrid larvicide on a constant 14-day rotation during midge breeding cycles. Further to this, the lakes have been treated with a higher concentration as per our Australian Pesticides and Veterinary Medicines Authority off label permit.

The Maylands Lakes water system has experienced recurring algal blooms over many years as a result of its complex environmental conditions. Addressing these issues is the focus of the Maylands Lakes Environmental Restoration Masterplan, which recognises that ecological recovery will occur over time rather than immediately.

While significant restoration works are underway, it is recognised intermittent algal blooms may still occur during this period. The City will continue to monitor conditions closely and respond where appropriate. Monitoring results and technical advice will inform any immediate management actions.

As part of the City's adaptive management approach, monitoring data will be reviewed and incorporated into the Monitoring, Evaluation, Reporting and Improvement (MERI) Plan. This ensures restoration actions remain informed by the latest scientific evidence and that management approaches can be refined as the ecological response of the lakes is identified.