Weekly water update

Data for week ending 11 September 2014
Last update at 4:00 PM 11 September 2014

Dam storage levels


1450.4 billion litres this week


More than week ending 04 September 2014

Avg. catchment rainfall

22.6 mm

This week


More than week ending 04 September 2014

Flow into dams

9,873 ML

This week


Less than week ending 04 September 2014

Water use

149 L

Daily avg. per person this week


More than week ending 04 September 2014

Melbourne's storages reach 80%

Melbourne’s water storages reached 80% of capacity this week, representing a net gain of 3.2 billion litres.

The milestone was reached despite a dry week, with the 0.1% gain the smallest weekly increase since the start of June, and well below the spring average of 0.5%.

The heavy rain in parts of Melbourne missed the major catchments, which received between 17.8 to 33 mm of rain, with an average of 22.6mm. This was 9.9% below the long-term average, 25.1mm.

Most rain fell towards the end of the week, and came too late to revive the runoff rates that had reduced due to dry soils.

The 9.9 billion litres of stream flow was 48.4 % below the 30-year average for the period (19.1 billion litres).

Water storages are now 80.0% (1,450.4 billion litres) full, compared with 77.3% (1,401.1 billion litres) at the same time last year – a difference of 49.3 billion litres.

Melburnians used an average of 149 litres of water per person per day. This is the 2 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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80.0% full at 11 September 2014

1,450,384 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 884,808
+3,400 since last week
82.8% 17.8 (verified)
View hourly unverified
Cardinia 286,911 187,348
-763 since last week
65.3% N/A
View hourly unverified
Upper Yarra 200,579 140,599
+852 since last week
70.1% 27.4 (verified)
View hourly unverified
Sugarloaf 96,253 93,992
-130 since last week
97.7% N/A
View hourly unverified
Silvan 40,445 34,816
-403 since last week
86.1% N/A
View hourly unverified
Tarago 37,580 37,824
-36 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 27,422
+156 since last week
90.6% N/A
View hourly unverified
Greenvale 26,839 18,160
+61 since last week
67.7% N/A
View hourly unverified
Maroondah 22,179 22,279
+100 since last week
100.0% 33 (verified)
View hourly unverified
O'Shannassy 3,123 3,136
-16 since last week
100.0% 19.8 (verified)
View hourly unverified
Total 1,812,175 1,450,384
+3,221 since last week
80.0% 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 17.8 20.9 -14.8% 3.4mm
Upper Yarra 27.4 27.5 -0.4% 5.4mm
O'Shannassy 19.8 36.5 -45.8% 10.2mm
Maroondah 33.0 24.0 37.5% 5.8mm

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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 4,103 7,910 -48.1% 4,132
Upper Yarra 2,266 5,320 -57.4% 3,134
O'Shannassy 2,046 3,440 -40.5% 2,503
Maroondah 1,458 2,470 -41.0% 1,555
Total 9,873 19,140 48.4% 11,324

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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 149 147

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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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