Sydney: Key findings
For the water account period 1 July 2024 to 30 June 2025
- Rainfall in the Sydney region during 2024–25 was below average for the first time since 2019–20.
- Total storage volume remained stable throughout the reporting year, finishing at 99.5% full on 30 June 2025, with Warragamba Reservoir — the region's largest reservoir — sitting above 100% capacity.
- Approximately 45% of the water resources accessible for take in the Sydney region were used, primarily through diversions to the urban system.
Climate and water
Rainfall
812 mm
9% below the average of 896 mm
Streamflow
below average
throughout most of the year
Storage
99.5% full
unchanged from last year
Water use from all sources
Water sourced
Water supplied
Water status of water resources
Water availability
7,128 GL
surface water available in 2024–25
27% less than last year
Water accessible
1,348 GL
total surface water and groundwater accessible in 2024–25
similar to last year
Water taken
610 GL
total surface water and groundwater taken in 2024–25
slightly more than last year