Frequently asked questions - Dams and water
What are the latest dam levels?
The SCA manages the network of dams that supply Sydney, the Blue Mountains and the Illawarra. For the latest information on dam levels, see the weekly Bulk Water Storage & Supply Reports, published every Thursday.
The SCA also publishes a weekly report on daily environmental flows from the following dams and water supply weirs: Avon, Cataract, Cordeaux, Nepean, Tallowa and Woronora dams, and Broughtons Pass and Pheasants Nest weirs. Reports of daily variable environmental flows commenced on 1 July 2010. For the latest information on environmental flows, see the weekly Environmental flows reports, published every Thursday.
Where are Sydney's drinking water catchments?
Sydney's water supply is currently sourced from a network of dams in five major catchments occupying an area of 16,000 square kilometres: Warragamba, Upper Nepean, Woronora, Shoalhaven and Blue Mountains catchments. This land extends north of Lithgow and Blackheath in the upper Blue Mountains, south to the source of the Shoalhaven River near Cooma, from Woronora in the east and west to the source of the Wollondilly River near Crookwell.
Although the catchment area represents only about two percent of NSW's land area, it supplies water to around 60 percent of the state's population. More information about our catchments is available on this website.
Where do I find current Sydney rainfall and temperature information?
For up-to-date information about rainfall, temperature trends and climate change see the Bureau of Meteorology's NSW Weather and Warnings and Climate Information webpages. The SCA also publishes information about how much rain has fallen in the catchments which is updated each weekday (except public holidays).