Maylands Lakes - Interim Water Quality Report 2022/23 now available

The City is pleased to advise the Maylands Lakes - Interim Water Quality Report 2022/23 is now available

This report conducts a preliminary review of the data collected between March 2022 and September 2023 with reference to the existing dataset (2019 onwards), and provides updates to the City to inform future lake monitoring and management practices.

Key findings of the report include:

• Since installation of the mixing units in 2021, Lake Bungana has had improved visibility. The lake appears to be responding well (with regard to general water quality and clarity) to being mixed for a prolonged period, with relatively stable monitoring results. This suggests that no additional management intervention is required at this time. However, a potential trend of reduced water clarity (from March 2022 onwards) should be closely monitored

• Conversely, Lake Brearley continues to show poor water clarity, higher nutrient concentrations and more intense algal blooms than Lake Bungana. Additional intervention may therefore be required to consistently achieve a similar amenity as Lake Bungana.

• The effectiveness of current management of the Maylands Lakes may be limited by the lake size, shape and depth, algal populations, nutrient levels and/or initial conditions at the time of mixer deployment.