July water use to date

11 billion litres

12 billion litres

Dam storage levels



Streamflow into dams
(cumulative May 2018 – April 2019)

25 billion litres

18 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 576 million litres, which was slightly above the forecast of 563 million litres.  Since 1 July 2018 we have used 11 billion litres of water, which is about one billion litres more than what we had forecast.


Dam levels


Over the last seven days, Perth’s dam storage levels have increased (by 5 billion litres) from 159 billion litres to 164 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 (15 dams in total) have received about three billion litres of streamflow.  Since May, they have received about 18 billion litres of streamflow.


Sprinkler roster compliance


The Winter Sprinkler Switch-off now applies, and our inspectors issued 121 warnings and 16 fines this week.  Since 1 January 2018, we have taken a total of 5371 actions (warnings + fines) compared with 6418 actions for the same period in 2017.


Annual rainfall

Perth has received 415.4mm 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.


General water news

Have you ever wanted to know how your suburb is tracking when it comes to saving water?  Our water use search tool allows you to find out the average water use of households in Perth’s metro area.


Media Enquiries:

Contact: Clare Lugar

Position: Manager Media & Strategic Communications

Phone: (08) 9420 3043