Every day, we supply about 1.5 billion litres of drinking water to over 5.3 million people in their homes and businesses. About 80% comes from Warragamba Dam. The rest comes from a mix of other dams, the Hawkesbury–Nepean River and Sydney Desalination Plant at Kurnell.
Our water network is flexible and many of our water delivery systems are interconnected. This means we can divert water between systems to meet demand in different areas, or shut down areas for maintenance or repairs.
We supply water from 11 major dams through 13 water delivery systems, with:
To keep homes and businesses running, we supply about 1.5 billion litres of high quality, safe drinking water every day. Read our weekly water supply report to find out how much drinking water we supplied last week.
Your water is filtered at one of the 9 drinking water filtration plants or Sydney Desalination Plant to meet the Find out more about the drinking water quality in your area in our daily drinking water quality report..
Sydney Desalination Plant supplies water to up to 1.5 million people across Sydney. It's privately owned and operated, and becomes part of our water network during drought. Find out more about desalination.
We work in partnership with WaterNSW, which supplies much of the untreated raw water from rivers and dams. Visit to find out the total dam water storage across Greater Sydney.