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Documents and Resources

Documents and Resources


Mosman’s Lawry Plunkett Reserve Environment & Heritage Project has been characterised by an intensive catchment education project. This report outlines all stages and activities of the education campaign and includes results from pre and post campaign surveys of residents of the catchment.

An important aspect of the Lawry Plunkett Reserve education campaign was an eco-gardening workshop for local residents. Gardening was targeted as an important activity in the catchment because of its potential to affect stormwater quality both in the bushland of Lawry Plunkett Reserve and in the waters of Balmoral Beach. The aim of the workshop was to provide interested gardeners in the catchment with knowledge, awareness, and skills, in gardening techniques and strategies that will benefit the water quality in the catchment.


This project was designed to test the quality of receiving waters in Mosman’s Bays and Coves, compared to national water quality guidelines.

Mosman Council’s Little Sirius Cove Stormwater Project included a water quality monitoring component. The SQIDs that Mosman Council has installed in catchments including Little Sirius Cove are known to be extremely effective at removing pollutants such as litter, organic matter such as leaves, and sediment. The monitoring program was designed to determine what effect they have on other aspects of water quality, including pollutants such as metals, nutrients, and other parameters including oxygen demand. This report presents the data and results of the monitoring program.

This project aimed to expand the understanding that catchment managers have of the biodegradation of the organics retained in a CDS device. A CDS device is a very efficient type of Stormwater Quality Improvement Device (SQID) that aims to reduce the total load of gross pollutants transported in urban stormwater from being discharged to receiving waters. The design of a CDS device employs the process of ‘indirect screening’ to capture and retain pollutants in a catchment sump for later removal. However, the design and location of the catchment sump is such that the pollutants are retained under water for a length of time until they are removed, which in practice can be for prolonged periods. During this project, a sampling program was developed to monitor the water column of a CDS device for typical by-products and ancillary effects of biodegradation.

The graphs are provided in this separate downloadable attachment:


Through its Community Environmental Contract, Mosman Council has conducted many substantial structural projects to improve water quality.

This project involved the installation of two Stormwater Quality Improvement Devices in the Balmoral catchment, creek rehabilitation works, erosion control and a complementary education campaign. This is the final report as presented to the NSW Stormwater Trust, which jointly funded the project.

This project involved the installation of several Stormwater Quality Improvement Devices in the Balmoral North Catchment. This is the final report as presented to Coasts and Clean Seas which jointly funded the project.

This project involved the installation of three Stormwater Quality Improvement Devices to treat the Little Sirius Cove East and West catchments. This is the final report as presented to the NSW Stormwater Trust, which jointly funded the project. A water quality monitoring project was also conducted and information on this is included in the monitoring section of this page.


Council’s policy for on-site detention systems is designed to provide temporary storage of stormwater runoff from developments and restrict discharge from the site to a rate which Council’s existing drainage system is capable of accommodating.


This report was prepared for the Sustainable Water Challenge, a competition which aimed to encourage Councils to consider using water sensitive urban design in their local government areas. Mosman’s proposal was a feasibility study for an environmental best-practice residential redevelopment.