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

29.2 billion litres

31.1 billion litres
Dam storage levels N/A 51.7%
Monthly streamflow into dams N/A 0 billion litres
March rainfall to date 19.5mm (March average rainfall 1876-2016) 3.0mm
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 931 million litres per day – above the demand forecast of 902 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)
31/03/2022 925 892
30/03/2022 868 892
29/03/2022 910 892
28/03/2022 796 915
27/03/2022 1001 915
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 237.77 billion litres of water – which is 9.52 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 51.7 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 177.5 billion litres. 

Annual rainfall

Perth has received 4.6mm of rainfall since 1 January 2022. The average (1876-2016) rainfall for the same period to the end of March is 41.7mm.

General water news

It was with great excitement we this week unveiled a very special community project in the heart of Rockingham. With help from students at Bungaree Primary School and local artist Samantha Prentice, we’ve transformed two indistinct water assets into vibrant community artworks.

The project is one of 60 we’ve completed across WA as part of our Splash of Colour program. As the name implies, Splash of Colour is about adding a sense of vibrancy to communities and suburbs by giving things like water pump stations and electrical cabinets a colourful new lease on life.

Inspired by ideas from students at Bungaree Primary School, Samantha designed two fabulous murals which showcase Rockingham’s unique coastal lifestyle.

You can check out the finished product and learn more about the project here.