Weekly water update

Data for week ending 28 August 2014
Last update at 4:00 PM 28 August 2014

Dam storage levels


1443.1 billion litres this week


More than week ending 21 August 2014

Avg. catchment rainfall

8.6 mm

This week


Less than week ending 21 August 2014

Flow into dams

12,350 ML

This week


Less than week ending 21 August 2014

Water use

149 L

Daily avg. per person this week


More than week ending 21 August 2014

Below average rain slows winter gains

Melbourne’s water storages increased by 0.3% of capacity in the past week, representing a net gain of 5.6 billion litres.

This is the first time in 2 months that storages have posted a below-average winter gain, as unseasonably warm, dry weather inhibited storage harvests.

The four major catchments received between 5.4 to 14.6 mm of rain, with an average of 8.6mm.

This was 66% below the long-term average for the period of 25.3 mm.

The low rainfall was reflected in streamflow results, which were also below average.

Streamflow delivered 12.4 billion litres to reservoirs, which was 37.4 % below the 30-year average for the period (19.7 billion litres).

Water storages are now 79.6% (1,443.1 billion litres) full, compared with 76.3% (1,382.6 billion litres) at the same time last year – a difference of 60.5 billion litres.

Melburnians used an average of 149 litres of water per person per day, 6 litres more than the previous week.

Permanent water use rules are currently in place. Visit water.vic.gov.au for information on water use rules and tips on how to save water.

The Victorian Government is helping everyone choose the right water for the job. Using alternative water sources, such as rainwater from our roofs, reduces our reliance on drinking water supplies. Visit rightwater.vic.gov.au for more information.


Dam storage levels

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79.6% full at 28 August 2014

1,443,067 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 877,715
+4,597 since last week
82.2% 10 (verified)
View hourly unverified
Cardinia 286,911 187,863
-134 since last week
65.5% N/A
View hourly unverified
Upper Yarra 200,579 140,999
+2,060 since last week
70.3% 5.4 (verified)
View hourly unverified
Sugarloaf 96,253 93,992
+174 since last week
97.7% N/A
View hourly unverified
Silvan 40,445 34,172
-954 since last week
84.5% N/A
View hourly unverified
Tarago 37,580 37,842
-37 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 27,162
+52 since last week
89.7% N/A
View hourly unverified
Greenvale 26,839 18,088
0 since last week
67.4% N/A
View hourly unverified
Maroondah 22,179 22,079
-180 since last week
99.5% 14.6 (verified)
View hourly unverified
O'Shannassy 3,123 3,155
-15 since last week
100.0% 6.8 (verified)
View hourly unverified
Total 1,812,175 1,443,067
+5,563 since last week
79.6% N/A

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Dam storage levels includes all of Melbourne's water storage areas that receive water from catchments and the desalination plant.


Monthly average storage levels of Melbourne's reservoirs over the years. Data is updated at the end of each month. View our interactive storage graph, displaying data from 1940 - present.

Rainfall at dams

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Catchment This week (mm) This week's long term average (ML) based on mean from previous 30 years Variation
(to the average)
Same time last year
Thomson 10.0 22.5 -55.6% 24.4mm
Upper Yarra 5.4 26.3 -79.5% 26.6mm
O'Shannassy 6.8 35.3 -80.7% 62.0mm
Maroondah 14.6 24.1 -39.4% 27.4mm

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Rainfall data is a weighted average catchment figure that is validated and provided for four major catchments only.

Flow into dams

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Catchment This week (ML) This week's long term average (ML) based on mean from previous 30 years Variation
(to the average)
Same time last year (ML)
Thomson 5,063 8,320 -39.1% 17,656
Upper Yarra 3,430 5,640 -39.2% 10,688
O'Shannassy 2,323 3,300 -29.6% 5,628
Maroondah 1,534 2,480 -38.1% 4,279
Total 12,350 19,740 37.4% 38,251

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Flow into dams is a total of water flowing from our four major catchments into reservoirs.

Water use for Melbourne

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Daily water use This week's daily average (L) Last week's daily average (L)
Per Person Water Use 149 143

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Water use shows Melbourne's total usage each day and includes Western Water. The total amount used by all Melbournians -both business and households.

All figures include non-metropolitan supply for Western Water (supplied since March 2000), which are not included in annual Melbourne metropolitan consumption figures.

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