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April water use to date

4 billion litres

4 billion litres

Dam storage levels


47 per cent

Cumulative streamflow into dams

185 billion litres

(Post 1975 May to March average)

153 billion litres

April rainfall to date

37.2 mm

(April mean rainfall 1994-2017)


44.2 mm

(April average rainfall 1876-2016)

0 mm















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


Water use

Average water use over the last week was 885,000,000 litres (885 million litres) per day, which was above the forecast of 873,000,000 litres (873 million litres).


Daily water use for the last five days


Actual water use – litres

Forecast – litres

Friday, 5 April 2019



Thursday, 4 April 2019




Wednesday, 3 April 2019



Tuesday, 2 April 2019



Monday, 1 April 2019



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


Since 1 July 2018, we have used 227 billion litres of water - this is about four billion litres above what we had forecast. 


Dam level (total for 15 dams)


The dam storage level has not changed over the past week and is sitting at 46.7 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).  Dam levels are no longer an accurate indicator of the health of Perth's overall water supply situation.


Streamflow (total for 15 dams)


From 1 May 2018 to 28 March 2019 the dams had received 152.7 billion litres of streamflow.  The post-1975 average for the May to April period is 187.2 billion litres.


Sprinkler roster compliance


The two-day-a-week sprinkler roster now applies across Perth, so make sure your sprinklers are programmed for your rostered water days and only to come on once, either before 9am or after 6pm.


Our team of inspectors issued 67 warnings and 74 fines this week.  Since 1 January 2019, we have taken a total of 2701 actions (warnings + fines) compared with 2783 actions for the same period in 2018.


Annual rainfall


Perth has received 13 mm of rainfall since 1 January 2019.  Average (1994-2017)  rainfall for this period is 87.9 mm.


General water news


Have you checked our water saving tips lately?


There are many little things that we can all do to save water in our homes and businesses.


Click here for the best tips you’ll find anywhere around!

Media Enquiries:

Contact: Clare Lugar

Position: Manager Media and Strategic Communications

Phone: (08) 9420 2555