Weekly water update

Data for week ending 03 September 2015
Last update at 4:00 PM 03 September 2015

Dam storage levels


1323.8 billion litres this week


More than week ending 27 August 2015

Avg. catchment rainfall

31.3 mm

This week


More than week ending 27 August 2015

Flow into dams

19,081 ML

This week


More than week ending 27 August 2015

Water use

142 L

Daily avg. per person this week


Less than week ending 27 August 2015

Catchments make strong gain from good rainfall, runoff

Melbourne’s dam levels increased by 1.0% of capacity over the past week on the back of good rain and runoff.

The 18.7 billion litre gain is equivalent to around 17 days’ drinking water for Melbourne.

The four major catchments received between 25.4 to 45.2 mm of rain, the average being 31.3 mm.

This was 33.2% above the long-term average for the period of 23.5 mm.

Streamflow results showed catchment soils had benefitted from the week’s rainfall.

The 19.1 billion litres of stream flow was 6.8% above the 30-year average for the period (17.9 billion litres).

Water storages are now 73.1% (1,323.8 billion litres) full, compared with 79.8% (1,446.7 billion litres) at the same time last year – a difference of 122.9 billion litres.

Melburnians used an average of 142 litres of water per person per day.

This is 6 litres less than the water usage by Melbourne residents during the previous week.

Permanent water use rules are currently in place. View water use rules and water saving tips or contact your local water retailer for advice.


Dam storage levels

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73.1% full at 03 September 2015

1,323,830 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 804,540
+8,857 since last week
75.3% 25.4 (verified)
View hourly unverified
Cardinia 286,911 173,827
+1,799 since last week
60.6% N/A
View hourly unverified
Upper Yarra 200,579 116,281
+1,305 since last week
58.0% 34 (verified)
View hourly unverified
Sugarloaf 96,253 77,979
+4,834 since last week
81.0% N/A
View hourly unverified
Silvan 40,445 35,652
+557 since last week
88.1% N/A
View hourly unverified
Tarago 37,580 38,019
+202 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 26,437
+204 since last week
87.3% N/A
View hourly unverified
Greenvale 26,839 26,052
+207 since last week
97.1% N/A
View hourly unverified
Maroondah 22,179 22,299
+758 since last week
100.0% 45.2 (verified)
View hourly unverified
O'Shannassy 3,123 2,744
+62 since last week
87.9% 35.8 (verified)
View hourly unverified
Total 1,812,175 1,323,830
+18,785 since last week
73.1% 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 25.4 19.4 30.9% 10.6mm
Upper Yarra 34.0 25.8 31.8% 22.6mm
O'Shannassy 35.8 33.6 6.5% 33.0mm
Maroondah 45.2 23.8 89.9% 24.2mm

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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 9,204 7,410 24.2% 4,278
Upper Yarra 5,812 5,000 16.2% 2,799
O'Shannassy 2,216 3,170 -30.1% 2,133
Maroondah 1,849 2,290 -19.3% 1,510
Total 19,081 17,870 6.8% 10,720

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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 142 148

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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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