Water Storage in Our Dams
| Related Links | |
|---|---|
 | Water Forever - Our 50-year plan to secure sustainable water and wastewater services |
| | Statewide Dam Storage Levels - Current storage information for all our dams and reservoirs |
| | Daily Water Supply - Water Supplied Daily to the Perth Metropolitan area (plus parts of the South West Region) over the past Six Months |
| | Daily Rainfall in Perth |
| | Rainfall at Perth's Dams |
| | Yearly Streamflow - Yearly Streamflow for Major Surface Water Sources |
| | Explanation of the units used to specify water consumption. |
Note: From 02 July 2007 the increase in the Water Corporation's dam storage is the result of available water traded from Harvey Water in the Stirling and Samson Dams.
| Water Storage in Our Dams on Tuesday,
09 February 2010 |
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| Current Storage: | 274.18 gigalitres (GL) | ||||||
| Total Capacity: | 622 GL | ||||||
| Percentage of Total Capacity: | 44.1 % | ||||||
| Available Surface Water: | 164.2 GL | ||||||
| Date | 03 Feb | 04 Feb | 05 Feb | 06 Feb | 07 Feb | 08 Feb | 09 Feb |
| Last Year (GL) | 220.89 | 220.35 | 219.75 | 219.14 | 218.67 | 218.01 | 217.30 |
| This Year (GL) | 277.59 | 276.94 | 276.19 | 276.26 | 275.52 | 274.82 | 274.18 |
| Difference (GL) | +56.69 | +56.60 | +56.44 | +57.12 | +56.85 | +56.81 | +56.88 |
Potential full capacity has been reduced by 54 GL in 2007/08 due to:
a. A decrease in South Dandalup Dam of 67 GL for streamflow and safety reasons; and,
b. The inclusion of a minimum of 13 GL from water trading with Harvey Water.
In the 2008/2009 financial year, the average Perth household used 734 litres of scheme water each day. The residential per capita consumption (the amount of scheme water each person used) was 280 litres each day.
The graph below shows the total volume of water stored in the dams supplying water to the Integrated Water Supply System (Perth, Mandurah, Pinjarra, Harvey and the Goldfields and Agricultural regions). These dams include Canning, Serpentine, Serpentine Pipehead, Victoria, Mundaring Weir, South Dandulup, North Dandalup, Wungong, Stirling and Churchman's Brook. Mundaring Weir normally only supplies water to the Goldfields and Agricultural regions.
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Available storage is the volume above 110 GL, which is the amount not readily available.
Please note that the vertical axis on the graph above does not start at zero.
(Click on the graph to view a larger version)
Remember, Be Waterwise
Use water wisely in your home and garden. Help to conserve the state's precious water resources for the future. See our Waterwise Guides for more information.
Current Water Storage in Our Main Dams
The graph above shows the volume of water stored in the main dams that supply water for the Integrated Water Supply System.
The total capacity from all our dams is 622 GL.
Dam Current
Storage
(GL)Total
Capacity
(GL)Percentage of
Total CapacityCanning Dam 38.9 90 43.1% Churchman Brook Dam 1.8 2 81.1% Mundaring Dam 36.8 64 57.8% North Dandalup Dam 26.6 75 35.6% Samson Dam (Metro Supply) 0.2 6 3.6% Serpentine Main Dam 63.1 138 45.8% Serpentine Pipehead Dam 2.1 3 81.6% South Dandalup Dam 31.8 138 23.1% Stirling Dam (Metro Supply) 38.5 37 105.4% Victoria Dam 4.7 9 49.4% Wungong Dam 29.6 60 49.5% Total 274.2 622 44.1%
Units Used to Specify Water Consumption and Storage
One Gigalitre = one thousand Megalitres One Gigalitre = one million kilolitres One Megalitre = one thousand kilolitres One Megalitre = one million litres One kilolitre = one thousand litres One kilolitre of water = one thousand kilograms = one tonne