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Perth metro weekly water update – 19 June 2020





June water use to date

11.9 billion litres

12.1 billion litres

Dam storage levels


43 per cent

Weekly streamflow into dams


0 billion litres

June rainfall to date

126.9 mm

(June average rainfall 1994-2017)

56.4 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 past week was 609 million litres per day, which was below the forecast of 611 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 292 billion litres of water – which is 7.5 billion litres over the forecast for this period.


Dam level (total for 15 dams)

The dam storage levels have risen slightly this week and are sitting at a combined 43.3 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 2020 the dams have received 0.8 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 2020, we have taken a total of 2995 actions (warnings + fines) compared with 4302 actions for the same period in 2019.


Annual rainfall


Perth has received 250 mm of rainfall since 1 January 2020. The average (1994-2017) rainfall for the same period is 303.5 mm (to the end of June).


General water news


Our leak detection dog Kep has earned the canine detection version of a degree with flying colours, receiving her Certificate of Compliance that qualifies her and handler Andrew Blair with the Canine Detection Certification of Australia.


To learn more about (and see a picture), visit the Latest Updates page on our website.


In case you haven’t heard, playgrounds and barbecues have reopened at Water Corporation-managed dams!

If you’re planning a visit this weekend, please remember to practice physical distancing and good hygiene at all times.


Find out more information about visiting our dams.




Media Enquiries:

Contact: Media team

Phone: 9420 2555