Perth Weekly Water Update - 8 July 2022
| Target | Actual | |
|---|---|---|
| July water use to date |
0.5 billion litres |
4.4 billion litres |
| Dam storage levels | N/A | 51.7% |
| Monthly streamflow into dams | N/A | 0 billion litres |
| July rainfall to date | 167.7mm (July average rainfall 1876-2016) | 6.2mm |
| 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 634 million litres per day – slightly below the demand forecast of 644 million litres per day.
Daily water use for the last five days
| Date | Actual water use (million litres) | Forecast water use (million litres) |
|---|---|---|
| 07/07/2022 | 641 | 643 |
| 06/07/2022 | 595 | 643 |
| 05/07/2022 | 664 | 643 |
| 04/07/2022 | 674 | 643 |
| 03/07/2022 | 627 | 646 |
| 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 4.4 billion litres of water – which is 0.07 billion litres above the forecast target for this period.
Dam levels (total for 15 dams)
The dam storage levels are slightly up 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 2022, the dams have received 2.8 billion litres of streamflow. The post-1975 average for the May to April period (called the streamflow year) is 173.9 billion litres.
Sprinkler roster compliance
Since 1 January 2022, we have taken a total of 3,122 actions (warnings + fines) compared with 3,648 actions for the same period in 2021.
Annual rainfall
Perth has received 241.2mm of rainfall since 1 January 2022. The average (1876-2016) rainfall for the same period to the end of July is 543.6mm.
General water news
A friendly reminder the Winter Sprinkler Switch-Off is in place, requiring scheme and bore water users in Perth, Peel, and parts of the South West and Great Southern to switch off their sprinklers until August 31.
By switching off your sprinklers when they’re needed less, we can collectively save around five billion litres of water this winter – enough to fill Optus Stadium five times.
Western Australians are generally pretty good at abiding by the Switch-Off, with our research showing nine out of 10 households do the right thing. To you, we say thank you.
So, with the rain well and truly here, there’s no better time to give the sprinklers a break and let the weather do the work. For more information visit: www.watercorporation.com.au/wintersprinklerswitchoff.