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July water use to date

6 billion litres

6 billion litres

Dam storage levels



Streamflow into dams
(cumulative May 2018 – April 2019)

25 billion litres

15 billion litres

July rainfall to date


(July 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 587 million litres, which was slightly above the forecast of 559 million litres.  Since 1 July 2018 we have used 6 billion litres of water, which is 30 million litres more than we had forecast.


Dam levels


Over the last seven days, Perth’s dam storage levels have increased (by about 4 billion litres) from 155 billion litres to 158 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).




Over the last seven days Perth’s dams have received about 5 billion litres of streamflow. 


Sprinkler roster compliance


The Winter Sprinkler Switch-off now applies, and our inspectors issued 229 warnings and 10 fines last week.  Since 1 January 2018 we have taken a total of 5,234 actions (warnings + fines) compared with 6,214 actions for the same period in 2017.


Annual rainfall

Perth has received 373.2mm of rainfall since January this year.  According to updated figures released by the Bureau of Meteorology the cumulative mean rainfall (1994-2017) for the Perth metro for the January to July period is 450.1mm.


Visit the Bureau of Meteorology’s Indigenous Weather Knowledge website this NAIDOC Week

Did you know here in Perth, we’re currently in the season of Makuru? This is one of the six seasons included in the yearly Nyoongar calendar.

Makuru coldest and wettest time of the year – learn more at the Bureau of Meteorology’s Indigenous Weather Knowledge website.


Media Enquiries:

Contact: Media Team

Phone: (08) 9420 2555