Perth Monthly Water Update - January 2023
| Target | Actual | |
|---|---|---|
| January water use to date |
33.8 billion litres |
34.3 billion litres |
| Dam storage levels | N/A | 54.9% |
| January streamflow into dams | N/A | 0.3 billion litres |
| January rainfall to date | 9.7mm (January average rainfall 1876-2016) | 0mm |
| Note: 1 billion litres = approximately 400 Olympic swimming pools. | ||
Water use
| Week ending | Daily average use (million litres per day) |
Daily average forecast (million litres per day) |
|---|---|---|
| 28/01/2023 | 1,132 | 1,091 |
| 21/01/2023 | 1,122 | 1,094 |
| 14/01/2023 | 1,056 | 1,092 |
| 07/01/2023 | 1,082 | 1,046 |
| Note: Average water use is calculated based on 7 days of data, from Sunday 1 January through to Friday 28 January, 2023. | ||
Since 1 July 2022 to date, the Integrated Water Supply Scheme (IWSS)* has supplied 174 billion litres of water - which is 7 billion litres below the forecast target for this period.
*The IWSS supplies Perth, the Goldfield and Agricultural Region and some parts of the South West.
Dam levels (total for 15 dams)
January's* metro dam storage levels are slightly down from December and are sitting at a combined average of 54.9 per cent* of full capacity (or 346 billion litres). This time last year our metro dam storage levels were at 55.8 per cent* of full capacity (or 352 billion litres).
*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 93 billion litres of streamflow. The post-1975 average for the May to April period (called the streamflow year) is 175.5 billion litres.
Annual rainfall
Perth has received 0mm of rainfall since 1 January 2023. The average (1876-2016) rainfall for the same period to the end of January is 9.7mm.
Temperature
The maximum temperature this month was recorded on 21 January at 39.5°C. The coolest day was recorded on 16 January at a maximum of just 25.1°C.