Where does the water supply from sydney come from?

The water supply for Sydney, Australia comes from various sources, including:

1. Warragamba Dam: The Warragamba Dam is the primary water source for Sydney. Located in the Wollondilly River catchment, approximately 100 kilometers west of Sydney, the dam impounds water from the Warragamba River. It has a storage capacity of around 2,028 gigaliters (GL) and is managed by WaterNSW.

2. Upper Nepean Dams: The Upper Nepean Dams are a series of five dams located in the Nepean River catchment, west of Sydney. These dams include the Cordeaux, Avon, Nepean, Cataract, and Fitzroy Falls Dams. They provide a combined storage capacity of approximately 770 GL and supplement the water supply from Warragamba Dam.

3. Shoalhaven Dams: The Shoalhaven Dams comprise three dams – Tallowa, Kangaroo Valley, and Yarrunga Dams – situated in the Shoalhaven River catchment, south of Sydney. These dams contribute around 175 GL of water to Sydney's supply.

4. Desalination Plant: The Sydney Desalination Plant, located in Kurnell, is a reverse osmosis desalination plant that converts seawater into fresh water. The plant has a production capacity of around 250 GL per year and serves as a backup source during times of drought or high water demand.

5. Treated Wastewater: Sydney Water, the government-owned water utility, also utilizes treated wastewater from sewage treatment plants for various non-drinking purposes, such as irrigation and industrial uses.

6. Groundwater Sources: Sydney also draws a small portion of its water supply from groundwater sources, such as the Botany Sands aquifer and the Hawkesbury Sandstone aquifer. These sources provide limited quantities of water and are used to supplement the main sources during periods of high demand.

7. Rainwater Tanks and Stormwater: Some properties in Sydney also collect rainwater in rainwater tanks for non-drinking purposes, such as gardening and laundry. Additionally, stormwater harvesting systems are employed in some areas to capture and reuse stormwater for irrigation and other purposes.

It's important to note that the specific sources used to supply water to Sydney may vary based on factors such as water demand, rainfall patterns, and reservoir levels. WaterNSW and Sydney Water closely monitor and manage the water supply to ensure a reliable and safe source for the city's residents and businesses.