Weekly water update

Data for week ending 27 April 2017
Last update at 4:00 PM 27 April 2017

Dam storage levels


1161.7 billion litres this week


Less than week ending 20 April 2017

Avg. catchment rainfall

49 mm

This week


More than week ending 20 April 2017

Flow into dams

5,570 ML

This week


More than week ending 20 April 2017

Water use

142 L

Daily avg. per person this week


Less than week ending 20 April 2017

Storages continue to drop despite wet week

Melbourne’s storage levels decreased by 0.2% of capacity this week, representing a net loss of 3.5 billion litres.

The four major catchments received between 34.0 and 70.6 mm of rain, the average being 49.0 mm. This was 91.4% above the long term average for the period of 25.6 mm.

The 5.6 billion litres of stream flow was 13.2% above the 30 year average for the period (4.9 billion litres).

Water storages are now 64.1% (1,161.7 billion litres) full, compared with 60.1% (1,089.3 billion litres) at the same time last year – a difference of 72.4 billion litres.

Melburnians used an average of 142 litres of water per person per day.  This is 3 litres less 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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64.1% full at 27 April 2017

1,161,696 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 677,990
-5,571 since last week
63.5% 34 (verified)
View hourly unverified
Cardinia 286,911 174,877
+1,506 since last week
61.0% N/A
View hourly unverified
Upper Yarra 200,579 101,553
-794 since last week
50.6% 60.2 (verified)
View hourly unverified
Sugarloaf 96,253 74,856
-1,354 since last week
77.8% N/A
View hourly unverified
Silvan 40,445 36,342
+1,371 since last week
89.9% N/A
View hourly unverified
Tarago 37,580 33,633
+270 since last week
89.5% N/A
View hourly unverified
Yan Yean 30,266 26,437
-221 since last week
87.3% N/A
View hourly unverified
Greenvale 26,839 23,287
-92 since last week
86.8% N/A
View hourly unverified
Maroondah 22,179 10,622
+1,113 since last week
47.9% 58.4 (verified)
View hourly unverified
O'Shannassy 3,123 2,099
+282 since last week
67.2% 70.6 (verified)
View hourly unverified
Total 1,812,175 1,161,696
-3,490 since last week
64.1% 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 34.0 29.9 13.7% 15.2mm
Upper Yarra 60.2 20.8 189.4% 15.6mm
O'Shannassy 70.6 23.3 203.0% 17.4mm
Maroondah 58.4 23.4 149.6% 22.4mm

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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 2,115 2,260 -6.4% 1,112
Upper Yarra 1,289 930 38.6% 57
O'Shannassy 968 830 16.6% 234
Maroondah 1,198 900 33.1% 442
Total 5,570 4,920 13.2% 1,845

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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 142 145

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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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