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

2.9 billion litres

2.8 billion litres
Dam storage levels N/A 53.6%
Monthly streamflow into dams N/A 0 billion litres
March rainfall to date 19.5mm (March average rainfall 1876-2016) 1.8mm
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 1,109 million litres per day – above the demand forecast of 989 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)
03/03/2022 819 980
02/03/2022 999 980
01/03/2022 1,205 980
28/02/2022 1,092 999
27/02/2022 1,125 999
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 209.76 billion litres of water – which is 7.77 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 53.6 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.

Sprinkler roster compliance

Since 1 January 2022, we have taken a total of 1,368 actions (warnings + fines) compared with 1,136 actions for the same period in 2021.

Annual rainfall

Perth has received 3.4mm of rainfall since 1 January 2022. The average (1876-2016) rainfall for the same period to the end of January is 41.7mm.

General water news

Long weekend. Check. Sunny weather. Check. Nothing planned?


Well, check out Churchman Brook Dam in the Perth Hills. The popular scenic spot, in the City of Armadale, has just been upgraded with new visitor facilities, including a fantastic new nature playground.


Part of a $2.5 million McGowan Government investment in the recreational areas at four metro dams, the upgrades also include a grass picnic area and new toilet and barbecue facilities to enhance the visitor experience.


The dam site attracts thousands of people every year taking advantage of the beautiful scenery, walking trails and picnic areas.


For further information, including directions, please see here.