Table showing target and actual water use, dam levels, streamflow and rainfall
Target Actual
October water use to date

5.9 billion litres

5.4 billion litres
Dam storage levels N/A 62.4%
Monthly streamflow into dams N/A 2.89 billion litres
October rainfall to date 51.5 mm (October average rainfall 1876-2016) 38.2 mm
Note: 1 billion litres = approximately 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 653 million litres per day – below the demand forecast of 731 million litres per day.

Daily water use for the last 5 days

Table showing daily water use for the last 5 days
Date Actual water use (million litres) Forecast water use (million litres)
08/10/2021 672 743
07/10/2021 686 743
06/10/2021 655 743
05/10/2021 636 743
04/10/2021 672 714
Note, water use is calculated up to 8am each day for the previous 24 hour period.

Since 1 July 2021 to date, we have used 61.38 billion litres of water – which is 1.72 billion litres above the forecast target for this period.

Dam levels (total for 15 dams)

The dam storage levels are slightly up on last week and are sitting at a combined 62.4 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 2021, the dams have received 117.9 billion litres of streamflow. The post-1975 average for the May to April period (called the streamflow year) is 178.7 billion litres.

Sprinkler roster compliance

Since 1 January 2021, we have taken a total of 4,988 actions (warnings + fines) compared with 5,080 actions for the same period in 2020.

Annual rainfall

Perth has received 755.8 mm of rainfall since 1 January 2021. The average (1876-2016) rainfall for the same period to the end of October is 809 mm.

General water news

It’s Customer Service Week and to celebrate, we’re giving a massive shoutout to our hardworking in team in the Water Corporation contact centre.


Whether you have an account or billing query, or are finding it hard to pay your bill, the contact centre team is there to help. You can get in touch with them on the phone, via email or through our webchat service.


Customer Service Week is an international event held each October to celebrate the importance of good old-fashioned customer service and to thank those who serve and support our customers on a daily basis. You can learn more about Customer Service Week here, and as always, to get in touch with the team in our contact centre, call 13 13 85.