Perth metro weekly water update 7 August 2020
Perth metro weekly water update – 7 August 2020
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Target |
Actual |
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4 billion litres |
4 billion litres |
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N/A |
46 per cent |
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N/A |
1 billion litres |
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124.3 mm (August average rainfall 1994-2017) |
15 mm |
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Note: 1 billion litres = approx. 400 Olympic swimming pools. Please note the figures in this table are rounded (except for rainfall) to the nearest whole number. |
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Water use
Average water use over the past week was 573 million litres per day, which was below the forecast of 587 million litres.
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Daily water use for the last five days |
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Date |
Actual water use (million litres) |
Forecast (million litres) |
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07/08/2020 |
582 |
586 |
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06/08/2020 |
576 |
586 |
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05/08/2020 |
575 |
586 |
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04/08/2020 |
557 |
586 |
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03/08/2020 |
599 |
587 |
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Note: water use is calculated up to 8am each day for the previous 24 hour period |
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Since 1 July 2020 to date, we have used 22.8 billion litres of water – which is 0.3 billion litres under the forecast target for this period.
Dam level (total for 15 dams)
The dam storage levels have risen slightly this week and are sitting at a combined 46 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 2020 the dams have received 10.43 billion litres of streamflow. The post-1975 average for the May to April period (called the streamflow year) is 178.21 billion litres.
Sprinkler roster compliance
The winter sprinkler switch off now applies. Since 1 January 2020, we have taken a total of 3934 actions (warnings + fines) compared with 5600 actions for the same period in 2019.
Annual rainfall
Perth has received 412.6 mm of rainfall since 1 January 2020. The average (1994-2019) rainfall for the same period is 573.3mm.