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June water use to date

5 billion litres

5 billion litres

  Dam storage levels


44 per cent

Weekly streamflow into dams


0 billion litres

June rainfall to date

126.9 mm

(June average rainfall 1994-2017)


173.1 mm

(June average rainfall 1876-2016)

28.4 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 685,000,000 litres (685 million litres) per day, which was above the forecast of 641,000,000 litres (641 million litres).


Daily water use for the last five days


Actual water use – litres

Forecast – litres
















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


Since 1 July 2018, we have used 273 billion litres of water - this is about 4 billion litres above what we had forecast. 


Dam level (total for 15 dams)


The dam storage level has remained stable this week and is sitting at 44 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 0.6 billion litres of streamflow.  The post-1975 average for the May to April (an inflow year) period is 187.2 billion litres.


Sprinkler roster compliance


The Winter Sprinkler Switch-off is now in place.  This means you need to ensure your sprinklers are kept switched off until the end of winter.


Our team of inspectors issued 226 warnings and 98 fines this week.  Since 1 January 2019, we have taken a total of 3885 actions (warnings + fines) compared with 3988 actions for the same period in 2018.


Annual rainfall


Perth has received 104.0 mm of rainfall since 1 January 2019.  The cumulative average (1994-2017) rainfall for the January to June period is 303.5 mm.


General water news


Don’t forget the Winter Sprinkler Switch-Off has started.


Make sure your garden reticulation is switched off otherwise you will risk a $100 fine.


For all the details on the Switch Off see our website


Media Enquiries:

Contact: Clare Lugar

Position: Manager Media and Strategic Communications

Phone: (08) 9420 2555