Weekly water update

Data for week ending 15 January 2015
Last update at 3:00 PM 15 January 2015

Dam storage levels


1384.0 billion litres this week


Less than week ending 08 January 2015

Avg. catchment rainfall

43.9 mm

This week


More than week ending 08 January 2015

Flow into dams

4,552 ML

This week


More than week ending 08 January 2015

Water use

142 L

Daily avg. per person this week


Less than week ending 08 January 2015

Summer storms soften storage slide

Substantial rain at the major catchments has slowed the rate of decline in water storages.

Storages declined by 0.2% - 3.8 billion litres – over the past week, which was well below the weekly average for summer (0.5%).

The good result came as the catchments received between 23.4 and 58.4mm of rain, with an average of 43.9mm. This was four times the long-term average for the period (10.8 mm).

Despite the wet week, the 4.6 billion litres of streamflow was 11.3% below the 30-year average for the period (5.1 billion litres).

The disparity between rainfall and streamflow is attributed to hot weather and minimal rainfall in preceding weeks. These conditions dry catchments, hampering their ability to generate streamflow.

Water storages are now 76.4% (1,384.0 billion litres) full, compared with 79.8% (1,446.7 billion litres) at the same time last year – a difference of 62.7 billion litres.

Melburnians used an average of 142 litres of water per person a day. This is 67 litres less than the previous week.

Information on water use rules and tips on how to save water are available from water.vic.gov.au or by contacting the government water retailers. Permanent water use rules are currently in place.

Dam storage levels

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76.4% full at 15 January 2015

1,384,043 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 827,272
+829 since last week
77.5% 58.4 (verified)
View hourly unverified
Cardinia 286,911 180,771
-252 since last week
63.0% N/A
View hourly unverified
Upper Yarra 200,579 154,081
-3,512 since last week
76.8% 33.2 (verified)
View hourly unverified
Sugarloaf 96,253 89,368
-42 since last week
92.8% N/A
View hourly unverified
Silvan 40,445 35,281
-309 since last week
87.2% N/A
View hourly unverified
Tarago 37,580 37,592
+36 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 26,798
-52 since last week
88.5% N/A
View hourly unverified
Greenvale 26,839 17,557
+42 since last week
65.4% N/A
View hourly unverified
Maroondah 22,179 13,506
-552 since last week
60.9% 23.4 (verified)
View hourly unverified
O'Shannassy 3,123 1,817
+51 since last week
58.2% 33 (verified)
View hourly unverified
Total 1,812,175 1,384,043
-3,761 since last week
76.4% 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 58.4 11.0 445.8% 0.0mm
Upper Yarra 33.2 12.0 188.7% 0.0mm
O'Shannassy 33.0 12.0 175.0% 0.0mm
Maroondah 23.4 8.0 188.9% 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 2,855 1,820 56.9% 887
Upper Yarra 134 1,130 -88.1% 553
O'Shannassy 713 1,160 -38.5% 912
Maroondah 850 1,020 -16.7% 791
Total 4,552 5,130 11.3% 3,143

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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 142 209

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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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