Mannus Lake UTS Study

Council has engaged the University of Technology Sydney (UTS), to undertake a research study of the algae bloom in Mannus Lake.

A research program was implemented in December 2018 to better understand the causes of toxic cyanobacterial blooms at Mannus Lake and to indicate possible management approaches.

Mannus Lake has recently experienced severe algal blooms of the potentially toxic cyanobacteria Chrysosporum ovalisporum. The bloom was first noticed between late 2017 and early 2018 after public concerns about downstream water quality.

The study aims to:

  • Monitor lake for blooms for public health safety and reporting
  • Determine the causes of the algal blooms in the lake;
  • Determine management strategies to stop or reduce future algal blooms and costs to implement and run and determine likely benefits;

 A final report will be provided at the end of 2019.

Interim Report – June 2019

The interim report from UTS will be tabled at the July 2019 Ordinary Council meeting.  It is expected that Council will be able to utilise the interim report to initiate a solution in advance of summer 2019/20.

The interim report examines the data collected to date from UTS sampling between December 2018 and early May 2019 and gives preliminary conclusions.

Sampling started just after the formation of another Chrysosporum bloom in November/December 2018 and analysis includes the algal count data that council had collected prior to this and other data collected by council.

Click here to read the Mannus Lake blue-green algal bloom management study – Interim Report(PDF, 1MB)

Please contact Council on 1300 ASK SVC (1300 275 782) or email [email protected] with any questions.