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

28.3 billion litres

31.5 billion litres
Dam storage levels N/A 56.7%
Monthly streamflow into dams N/A 0 billion litres
January rainfall to date 9.7mm (January average rainfall 1876-2016) 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 1,205 million litres per day – above the demand forecast of 1,048 million litres per day.

Daily water use for the last five days

Table showing daily water use for the last 5 days
Date Actual water use (million litres) Forecast water use (million litres)
27/01/2022 1,054 1,045
26/01/2022 1,038 1,045
25/01/2022 1,184 1,045
24/01/2022 1,231 1,049
23/01/2022 1,319 1,049
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 170.40 billion litres of water – which is 3.24 billion litres above the forecast target for this period.

Dam levels (total for 15 dams)

The dam storage levels are slightly down on last week and are sitting at a combined 56.7 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). 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 138.7 billion litres of streamflow. The post-1975 average for the May to April period (called the streamflow year) is 175.4 billion litres.

Sprinkler roster compliance

Since 1 January 2022, we have taken a total of 586 actions (warnings + fines) compared with 653 actions for the same period in 2021.

Annual rainfall

Perth has received 0mm of rainfall since 1 January 2022. The average (1876-2016) rainfall for the same period to the end of January is 9.7mm.

General water news

With schools back next week, it’s an opportunity to encourage some waterwise behaviours in your little ones.


Helping save our most precious resource at a young age can develop children as water-saving champions for life.


Our advice article here details several ways to help children save water at home, and how to build water-saving habits into your daily chores.