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November water use to date

1.5 billion litres

1.5 billion litres

Dam storage levels


59 per cent

Cumulative streamflow into dams

165 billion litres

(Post 1975 May to October average)

139 billion litres

November rainfall to date

23.2 mm

(November mean rainfall 1994-2017)


22.4 mm

(November 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 daily water use over the last week was 819 million litres, which was above the forecast of 753 million litres.  Since 1 July 2018 we have used 79 billion litres of water - this is about 5 billion litres above what we had forecast for this period.


Dam level (total for 15 dams)


The dam storage level has remained steady over the last week, remaining at 59 per cent* of full capacity.


*Please note some dams are filled from different sources and this increase may include the transfer of groundwater and desalinated seawater from treatment plants as well as streamflow (that comes from rainfall).  The percentage of full capacity number can also go up or down depending on how much water has been supplied to customers this week from dams.


Streamflow (total for 15 dams)


From 1 May 2018 to 1 November 2018 the dams have received 139 billion litres of streamflow.  The post-1975 average for the May to November period is 174 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 101 warnings and 105 fines this week.  Since 1 January 2018, we have taken a total of 7,061 actions (warnings + fines) compared with 7,949 actions for the same period in 2017.


Annual rainfall


Perth has received 736.6 mm of rainfall since January this year.  The cumulative average rainfall for January to December is 732.8 mm.


General water news


Our inspectors issued 105 fines across Perth this week for breaching the sprinkler roster, which is more than double the 42 fines issued last week.


Remember to ensure your sprinklers are set to come on once during your watering day, either before 9am or after 6pm. Watering days are based on the last digit of a house or lot number. To find out your watering days, visit


Today is Friday, so you should only have your sprinklers on it the last digit of a house or lot number ends in a 3, 7 or a 0. If you own a bore and the last digit of your house or lot number ends in 5, you can also water today.


If you witness anyone breaching the sprinkler roster you can make a report at or by phoning 13 10 39. In 2017, nearly 90 per cent of warnings issued by Water Corporation were the result of contact from the public.

Media Enquiries:

Contact: Media Team

Phone: (08) 9420 2555