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

16.2 billion litres

16.2 billion litres
Dam storage levels N/A 43.5%
Monthly streamflow into dams N/A 0.39 billion litres
June rainfall to date 173.1mm (June average rainfall 1876-2016) 70.0mm
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 602 million litres per day – below the demand forecast of 619 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)
25/06/2021 650 607
24/06/2021 636 607
23/06/2021 613 607
22/06/2021 641 607
21/06/2021 516 634
Note, water use is calculated up to 8am each day for the previous 24 hour period.

Since 1 July 2020, we have used 289.94 billion litres of water – which is 1.68 billion litres below 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 43.5 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 2021, the dams have received 2.2 billion litres of streamflow. The post-1975 average for the May to April period (called the streamflow year) is 175.59 billion litres.

Sprinkler roster compliance

Since 1 January 2021, we have taken a total of 3,190 actions (warnings + fines) compared with 3,169 actions for the same period in 2020.

Annual rainfall

Perth has received 305.6mm of rainfall since 1 January 2021. The average (1876-2016) rainfall for the same period to the end of June is 375.9mm.

General water news

With the school holidays around the corner, keeping kids entertained can be difficult. Challenge them to consider how our actions today will shape their future by visiting the WA Museum Boola Bardip for a hands-on day of learning.


We’ve partnered with the Foundation for the WA Museum and the WA Museum to create an interactive experience highlighting how water and climate have played a key role in creating WA's unique environment and continues to shape our state’s future.


Best of all, entry to WA Museum Boola Bardip is free. The museum is open daily from 9.30am to 5pm.



1. Book a ticket online or by calling 1300 134 081. This is recommended if you wish to visit on a particular day.

2. Walk-up entry is available each day — no booking required! However, you may experience a wait time during busy periods such as weekends.