June water use to date

13 billion litres

13 billion litres

Dam storage levels



Streamflow into dams
(cumulative May 2018 – April 2019)

25 billion litres

5 billion litres

June rainfall to date


(mean rainfall 1994-2017)


Note: 1 billion litres = approx. 400 Olympic swimming pools.  Please note these figures are rounded (except for rainfall) to the nearest whole number.


Water use


Average daily water use over the last week was 630 million litres, which was slightly above the forecast of 609 million litres.  Since 1 July 2017 we have used 280 billion litres of water, which is 7 billion litres below the 287 billion litres we had forecast.


Dam levels


Over the last seven days, Perth’s dam storage levels have increased (by about 3 billion litres) from 143 billion litres to 145 billion litres of usable storage. Perth’s dams store water from three different sources… groundwater and desalinated seawater transferred from treatment plants as well as streamflow (produced by rainfall).


Sprinkler roster compliance


The Winter sprinkler roster now applies, and our inspectors issued 232 warnings and 31 fines last week.  Since 1 January 2018 we have taken a total of 4523 actions (warnings + fines) compared with 5399 actions for the same period in 2017.


Annual rainfall


Perth has received 295.2mm of rainfall since January this year.  According to updated figures released by the Bureau of Meteorology the cumulative mean rainfall for the Perth metro is 303.5mm (1994-2017).


Planning Perth’s water supplies for the long-term


In October 2009 we released Water Forever: Towards Climate Resilience our 50-year plan to deliver sustainable water and wastewater services to Perth and surrounding areas.


Water Forever was developed with input from the community and businesses to ensure it reflected their views and preferences for securing our water future.


As you can imagine our plan for securing Perth’s water future is quite detailed – it has over 100 pages of information - but if you only have time for the headlines – we have an eight page summary available. 


Why not give the summary a read and impress your mates about your water knowledge at your next BBQ!

Media Enquiries:

Contact: Public Information Management Team

Phone: (08) 9420 2555