Weekly water update

No weekly report until Thursday 8 January

There will be no weekly water report for 25 December and 1 January due to office closure, we apologise for any inconvenience this may cause. The daily water report will continue through this period.

Data for week ending 18 December 2014
Last update at 11:00 AM 19 December 2014

Dam storage levels


1410.5 billion litres this week


Less than week ending 11 December 2014

Avg. catchment rainfall

6.3 mm

This week


Less than week ending 11 December 2014

Flow into dams

3,484 ML

This week


Less than week ending 11 December 2014

Water use

198 L

Daily avg. per person this week


More than week ending 11 December 2014

Typical summer week sees 0.4% decline

Melbourne’s water storages have experienced a typical summer week, declining by 0.4%.

The 7.1-billion litre drop followed a dry week at the four major catchments that harvest most of the city’s water.

The catchments received between 2.4 and 9.4 mm of rain, with the average being 6.3 mm. This was 70.8 % below the long-term average for the period (21.5 mm).

The catchments produced 3.5 billion litres of stream flow into the reservoirs. This was more than half of the long-term average for the period (8.1 billion litres).

Water storages are now 77.8% (1,410.5 billion litres) full, compared with 81.1% (1,468.8 billion litres) at the same time last year – a difference of 58.3 billion litres.

Melburnians used an average of 198 litres of water per person per day. This is 42 litres more 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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77.8% full at 18 December 2014

1,410,533 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 847,286
-6,832 since last week
79.3% 9.4 (verified)
View hourly unverified
Cardinia 286,911 182,193
-781 since last week
63.5% N/A
View hourly unverified
Upper Yarra 200,579 153,584
+1,722 since last week
76.6% 2.4 (verified)
View hourly unverified
Sugarloaf 96,253 90,848
-465 since last week
94.4% N/A
View hourly unverified
Silvan 40,445 35,745
+495 since last week
88.4% N/A
View hourly unverified
Tarago 37,580 37,753
-46 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 27,344
-198 since last week
90.3% N/A
View hourly unverified
Greenvale 26,839 17,813
+14 since last week
66.4% N/A
View hourly unverified
Maroondah 22,179 16,034
-612 since last week
72.3% 5.2 (verified)
View hourly unverified
O'Shannassy 3,123 1,933
-337 since last week
61.9% 5.4 (verified)
View hourly unverified
Total 1,812,175 1,410,533
-7,040 since last week
77.8% 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 9.4 21.0 56.1% 0.0mm
Upper Yarra 2.4 21.0 -88.6% 1.2mm
O'Shannassy 5.4 22.0 -75.9% 4.4mm
Maroondah 5.2 22.0 -76.6% 4.0mm

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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 1,791 3,250 -44.9% 2,393
Upper Yarra 165 1,840 -91.0% 1,636
O'Shannassy 763 1,560 -51.1% 1,480
Maroondah 765 1,440 -46.9% 1,265
Total 3,484 8,090 56.9% 6,774

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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 198 156

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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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