November water use to date

25 billion litres

26 billion litres

Dam storage levels


49.7 per cent

Weekly streamflow into dams


44 billion litres

November rainfall to date

23.2 mm

(November average rainfall 1994-2017)

17.8 mm

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













Water use


Average water use over the last week was 951 million litres per day, which was above the forecast of 894 million litres.


Daily water use for the last five days


Actual water use (million litres)

Forecast (million litres)
















Note: water use is calculated up to 8am each day for the previous 24 hour period


Since 1 July 2019, we have used 102.7 billion litres of water – which is over the forecast for this period.


Dam level (total for 15 dams)

The dam storage levels have dropped slightly this week and are sitting at a combined 49.7 per cent* of full capacity.


*Please note some dams are filled from different sources - dam levels include the transfer of groundwater and desalinated seawater from treatment plants as well as streamflow (that comes from rainfall).  As we use many different sources of water, dams are no longer an accurate indicator of the health of Perth's overall water supply situation.


Streamflow (total for 15 dams)


From 1 May 2019 the dams have received 44.1 billion litres of streamflow.  The post-1975 average for the May to April period (called the streamflow year) is 183.9 billion litres.


Sprinkler roster compliance


The two-day a week sprinkler roster now applies. Since 1 January 2019, we have taken a total of 8345 actions (warnings + fines) compared with 7822 actions for the same period in 2018.


Annual rainfall


Perth has received 580.04 mm of rainfall since 1 January 2019. The cumulative average (1994-2017) rainfall for the January to November period is 721.1 mm.


General water news


We use a lot of water on our gardens when the weather warms up.


But it is possible to have amazing looking gardens that can thrive through a Perth summer without the need to use lots of water.


To find out what plants would suit the conditions of your suburb and your garden, visit our Waterwise Plants Directory – it is one of the most popular pages on our website.



Media Enquiries:

Contact: Media team

Phone: (08) 9420 2555 (24/7)