April water use to date

7.9 billion litres

8.1 billion litres

Dam storage levels



Flow into dams

(May – December 2017)

25 billion litres

94 billion litres

April rainfall to date

44.2 mm

(monthly average)

0 mm

Note: 1 billion litres = approx. 400 Olympic swimming pools


Water use

Average daily water use over the last week was 892 million litres, which was above the forecast of 875 million litres.  Financial year to date water use is 226 billion litres, which is 9 billion litres below the 235 billion litres we had forecasted.


Dam levels

Over the last seven days, Perth’s dam storage levels have slightly fallen from 139.5 billion litres to 139.0 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).


Sprinkler roster compliance

The two-day-per week sprinkler roster now applies, and our inspectors issued 74 warnings and 35 fines last week.  Since 1 January 2018 we have taken a total of 2783 actions (warnings + fines) compared with 2997 actions for the same period in 2017.



So far this month Perth has received 0mm of rainfall – the April average is 44.2mm.  So far in 2018 we have received 109.2mm of rainfall, which is above the average of 85.9mm.


General water news

This is Seek a Leak week!  Leaks can waste of lot of water when they go unnoticed.  Most leaks can be spotted by just taking a look around for things such as dripping taps, leaky toilets, and broken sprinkler heads.  But some leaks are harder to find especially if they are underground. 


Our online leak detection tool is a simple and handy way to find out whether you have a leak in your home.  It’s available at

Media Enquiries:

Contact: Clare Lugar

Position: Manager Media & Strategic Communications

Phone: (08) 9420 2555