Weekly water update

Data for week ending 19 May 2016
Last update at 5:00 PM 19 May 2016

Dam storage levels


1071.6 billion litres this week


Less than week ending 12 May 2016

Avg. catchment rainfall

2.9 mm

This week


Less than week ending 12 May 2016

Flow into dams

3,679 ML

This week


Less than week ending 12 May 2016

Water use

153 L

Daily avg. per person this week


More than week ending 12 May 2016

Dams' downward trend continues


Melbourne’s water storages have decreased by 5.2 billion litres over the past week, with only one day of rain over the major catchments.

The 0.3% drop was three times higher than the average weekly decline for May last year, which was 0.1%.

The four major catchments received between 2.2 to 3.6 mm of rain, the average being 2.9 mm.

This was 85.8% below the long-term average for the period of 20.4 mm.

The 3.7 billion litres of stream flow was 25.8% below the 30-year average for the period (5 billion litres).

Water storages are now 59.1% (1,071.6 billion litres) full, compared with 69.7% (1,262.8 billion litres) at the same time last year - a difference of 191.2 billion litres.

Melbournians used an average of 153 litres of water per person per day.

This is 5 litres more than the previous week.

Permanent water use rules are currently in place and Target 155 has been launched to encourage Melburnians to reduce water consumption.

Information on Target 155 is available on the Department of Environment, Land, Water and Planning’s website or by contacting your local water retailer.




Dam storage levels

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59.1% full at 19 May 2016

1,071,561 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 611,487
-5,489 since last week
57.3% 3.6 (verified)
View hourly unverified
Cardinia 286,911 174,237
+1,684 since last week
60.7% N/A
View hourly unverified
Upper Yarra 200,579 101,756
-156 since last week
50.7% 2.2 (verified)
View hourly unverified
Sugarloaf 96,253 54,545
-1,401 since last week
56.7% N/A
View hourly unverified
Silvan 40,445 36,120
+220 since last week
89.3% N/A
View hourly unverified
Tarago 37,580 32,993
-35 since last week
87.8% N/A
View hourly unverified
Yan Yean 30,266 23,853
-25 since last week
78.8% N/A
View hourly unverified
Greenvale 26,839 23,651
-248 since last week
88.1% N/A
View hourly unverified
Maroondah 22,179 10,205
+738 since last week
46.0% 2.4 (verified)
View hourly unverified
O'Shannassy 3,123 2,714
-449 since last week
86.9% 2.2 (verified)
View hourly unverified
Total 1,812,175 1,071,561
-5,161 since last week
59.1% 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 3.6 18.5 -80.5% 0.0mm
Upper Yarra 2.2 21.2 -89.6% 0.0mm
O'Shannassy 2.2 25.8 -91.5% 0.2mm
Maroondah 2.4 20.6 -88.3% 0.0mm

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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 1,784 1,980 -9.9% 1,082
Upper Yarra 86 950 -90.9% 111
O'Shannassy 941 1,040 -9.5% 449
Maroondah 868 990 -12.3% 613
Total 3,679 4,960 25.8% 2,255

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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 153 148

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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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