Table showing target and actual water use, dam levels, streamflow and rainfall
  Target Actual
January water use to date 18 billion litres 17 billion litres
Dam storage levels NA 47%
Weekly streamflow into dams NA 44 billion litres
January rainfall to date 16.7mm (Jan average rainfall 1994-2017) 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, million litres per day, which was above the forecast of 1,049 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)
17/01/2020 1065 1051
16/01/2020 1062 1051
15/01/2020 1057 1051
14/01/2020 1037 1051
13/12/2020 1108 1046
Note, water use is calculated up to 8am each day for the previous 24 hour period.

Since 1 July 2019, we have used 158.5 billion litres of water – which is around 6 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 46.7 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. Since 1 January 2020, we have taken a total of 479 actions (warnings + fines) compared with 425 actions for the same period in 2019.

Annual rainfall

Perth has received 1.80 mm of rainfall since 1 January 2019. The average (1994-2017) rainfall for the January period is 16.7 mm.

General water news

How does your water use compare? Just enter your account number and some details about your household to find out how you compare to similar households in your suburb.

Media Enquiries:

Contact: Clare Lugar

Position: Manager Media and Strategic Communications

Phone: (08) 9420 2555