Table showing target and actual water use, dam levels, streamflow and rainfall
  Target Actual
April water use to date 3 billion litres 3 billion litres
Dam storage levels NA 43%
Weekly streamflow into dams NA 44 billion litres
April rainfall to date 37.2mm (Feb average rainfall 1994-2017) 0.00mm
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 893 million litres per day, which was above the forecast of 889 million litres.

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)
3/04/2020 873 877
2/04/2020 895 877
1/04/2020 905 877
31/03/2020 856 877
30/03/2020 944 903
 29/03/2020 878   903
Note, water use is calculated up to 8am each day for the previous 24 hour period.

Since 1 July 2019, we have used 233.3 billion litres of water – which is around 4.9 billion litres over the forecast for this period

Dam level (total for 15 dams)

The dam storage levels have dropped slightly this week and are sitting at a combined 42.7 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 2019 the dams have received 44.1 billion litres of streamflow. The post-1975 average for the May to April period (called the streamflow year) is 183.9 billion litres.

Sprinkler roster compliance

The two-day a week sprinkler roster now applies. There were no warnings or fines this week.

Annual rainfall

Perth has received 68.8 mm of rainfall since 1 January 2019. The average (1994-2017) rainfall for the April period is 87.9 mm.

General water news

Please remember that flushing anything other than the 3Ps - pee, poo and (toilet) paper - may result in a blockage.

Items such as wet wipes, paper kitchen towel and sanitary products should be disposed of in a bin, as such material does not break down in wastewater pipes.

If the blockage or overflow is on your property, you are responsible for any repair costs.

For more information, please see our tips on what not to flush.

Media Enquiries:

Contact: Clare Lugar

Position: Manager Media and Strategic Communications

Phone: (08) 9420 2555