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Legislative Assembly for the ACT: 2021 Week 04 Hansard (Friday, 23 April 2021) . . Page.. 1211 ..

In addition to the routine water quality monitoring undertaken for bacteria by ACT Health and blue-green algae by Access Canberra, EPSDD also maintain a background surveillance water quality monitoring program for Lake Tuggeranong. This program collects water quality information six to eight times per year to inform the long-term management of Lake Tuggeranong, including data on the phytoplankton community, which is comprised of many groups of aquatic organisms including blue-green algae (called cyanophyta). In addition, EPSDD also supports the Upper Murrumbidgee Waterwatch program. This citizen science program supports volunteers to undertake monthly water quality testing around Lake Tuggeranong and its catchments, as well as undertake bi-annual macroinvertebrate (waterbug) diversity and biennial riparian (streamside) vegetation condition assessments. These data are published in the annual Upper Murrumbidgee Waterwatch CHIP report, released in March each year (

(3) The following data for Lake Tuggeranong is provided as spreadsheets:

Attachment A: ACT Health faecal indicator bacteria (Enterococcus spp.) coliform counts from 2015 – 2020. This data consists of counts of ‘coliform forming units/100mL’. Three sites in Lake Tuggeranong are monitored weekly during the swimming season. ACT Health publish much of these data via the ACT open data portal:

Attachment B: EPSDD phytoplankton community data 2015 – 2020. These data consist of six to eight grab-samples per year from two locations in Lake Tuggeranong. Data consists of cell counts (number of cells/mL) of major taxonomic groups of algae. Blue-green algae species are present in the group ‘Cyanophyta’

Attachment C: Access Canberra blue-green algae species data for Lake Tuggeranong, 2015 – 2020. This data consists of cell counts (cells/mL) and biovolumes (m3/L) for individual genera of algae, sampled at three locations in Lake Tuggeranong.

(Copies of the attachments are available at the Chamber Support Office).

Questions without notice taken on notice

Environment—urban vegetation

Ms Vassarotti (in reply to a question by Ms Castley on Tuesday, 30 March 2021):

The Question on Notice is premised on a graph presented in the report “Temperature check: Greening Australia's warming cities” by Monash University and the Australian Conservation Foundation (ACF) which showed that between 2013 and 2020 the ACT had the largest reduction in urban forest cover of any Local Government Area (LGA) covered in the report. This report indicates a reduction of total urban vegetation in Canberra from 62 per cent in 2013 to 34 percent in 2020.

This report used data from “Where will all the trees be? An assessment of urban forest cover and management for Australian cities” produced by NESP Hub for Clean Air and Urban Landscapes at the Royal Melbourne Institute of Technology (RMIT).

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