Weekly water update

Data for week ending 04 February 2016
Last update at 5:00 PM 04 February 2016

Dam storage levels


1203.9 billion litres this week


Less than week ending 28 January 2016

Avg. catchment rainfall

54.5 mm

This week


More than week ending 28 January 2016

Flow into dams

4,732 ML

This week


More than week ending 28 January 2016

Water use

161 L

Daily avg. per person this week


Less than week ending 28 January 2016

Summer rain revives runoff into the reservoirs

Melbourne dam levels decreased by 0.2% (3.5 billion litres) of capacity over the past week.

Strong rainfall across all four major catchments helped stem the storage decline, which on average sees storages shed 0.5% each week in summer.

The four major catchments received between 44.0 to 64.2 mm of rain, the average being 54.5 mm.

This was 322.5% above the long-term average for the period of 12.9 mm.
Despite rainfall four times the average for this time of year, dry catchment soils moderated the volume of streamflow generated.

The 4.7 billion litres of stream flow was 26.5% above the 30-year average for the period (3.7 billion litres).

This was the first time weekly streamflow was above the 30-year average since September 2015.

Water storages are now 66.4% (1,203.9 billion litres) full, compared with 75.0% (1,358.8 billion litres) at the same time last year - a difference of 154.9 billion litres.

Melbournians used an average of 161 litres of water per person per day. This is 11 litres less than 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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66.4% full at 04 February 2016

1,203,868 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 701,640
-3,788 since last week
65.7% 59 (verified)
View hourly unverified
Cardinia 286,911 171,015
+1,170 since last week
59.6% N/A
View hourly unverified
Upper Yarra 200,579 118,353
-1,286 since last week
59.0% 44 (verified)
View hourly unverified
Sugarloaf 96,253 75,863
-347 since last week
78.8% N/A
View hourly unverified
Silvan 40,445 36,311
+968 since last week
89.8% N/A
View hourly unverified
Tarago 37,580 35,436
+281 since last week
94.3% N/A
View hourly unverified
Yan Yean 30,266 24,963
0 since last week
82.5% N/A
View hourly unverified
Greenvale 26,839 23,958
-158 since last week
89.3% N/A
View hourly unverified
Maroondah 22,179 13,732
-424 since last week
61.9% 64.2 (verified)
View hourly unverified
O'Shannassy 3,123 2,597
+78 since last week
83.2% 57.4 (verified)
View hourly unverified
Total 1,812,175 1,203,868
-3,506 since last week
66.4% 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 59.0 11.9 395.8% 0.0mm
Upper Yarra 44.0 12.6 249.2% 0.4mm
O'Shannassy 57.4 14.3 301.4% 0.8mm
Maroondah 64.2 16.5 289.1% 0.6mm

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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 2,729 1,210 125.5% 826
Upper Yarra 403 740 -45.5% 252
O'Shannassy 632 930 -32.0% 674
Maroondah 968 860 12.6% 602
Total 4,732 3,740 26.5% 2,354

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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 161 172

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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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