Navigate home logo





July water use to date

6 billion litres

6.2 billion litres

Dam storage levels


44.5 per cent

Weekly streamflow into dams


4.2 billion litres

July rainfall to date

145.3 mm

(July average rainfall 1994-2017)

20.6 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
















Water use


Average water use over the past week was 612 million litres per day, which was above the forecast of 584 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 2020, we have used 5.39 billion litres of water – which is 0.02 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 44.5 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 4.2 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 3450 actions (warnings + fines) compared with 4800 actions for the same period in 2019.



Annual rainfall


Perth has received 336 mm of rainfall since 1 January 2020. The average (1994-2017) rainfall for the same period is 396.2mm (to the end of July).



General water news


Households are now able to benefit from a $100 rebate on the cost of fixing water leaks under a new program targeting metropolitan properties across Perth and Peel.  


The initiative follows a recent water use study of more than 1,500 households across Perth and Peel which identified leaks in more than 17 per cent of properties.


Eligible customers who have engaged a licensed plumber to repair a leak can apply for $100 rebate on the property's Water Corporation account. For more information visit: Waterwise and Detect-a-leak


Water Corporation has awarded more than $80,000 to 12 community projects in the Kimberley and a further $100,000 to 22 not-for-profits impacted by COVID-19 at a special presentation evening in Broome this week.


Projects supporting children with special needs, caring for local wildlife and promoting cultural learning are among those to receive funding through the latest round of the Water Corporation's Kimberley Community Grants Scheme. For more information visit Kimberley Community Projects


Media Enquiries:

Contact: Media Team

Phone: 9420 2555