Weekly water update

Data for week ending 25 June 2015
Last update at 4:00 PM 25 June 2015

Dam storage levels


1241.3 billion litres this week


Less than week ending 18 June 2015

Avg. catchment rainfall

6.1 mm

This week


Less than week ending 18 June 2015

Flow into dams

4,883 ML

This week


More than week ending 18 June 2015

Water use

143 L

Daily avg. per person this week


Same as week ending 18 June 2015

Unseasonal decline for Melbourne's storages  

Another unseasonably dry winter week has seen Melbourne’s water storages decrease by 3.3 billion litres.

The 0.2% drop was in contrast to the average winter weekly performance, when storages typically rise by 0.4%.

The declining trend over the week was due to low rainfall and streamflow.

The four major catchments received between 1.0 to 10.2 mm of rain, the average being 6.1 mm. This was 79.3 % below the long-term average for the period of 29.2 mm.

With little rain to generate runoff into the reservoirs, streamflow results were also underwhelming.

The 4.9 billion litres of stream flow was 56.9% below the 30-year average for the period (11.3 billion litres).

Water storages are now 68.5% (1,241.3 billion litres) full, compared with 71.8% (1,301.2 billion litres) at the same time last year – a difference of 59.9 billion litres.

Melburnians used an average of 143 litres of water per person per day, the same as 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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68.5% full at 25 June 2015

1,241,307 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 773,601
+686 since last week
72.4% 10.2 (verified)
View hourly unverified
Cardinia 286,911 167,964
-1,521 since last week
58.5% N/A
View hourly unverified
Upper Yarra 200,579 99,048
-1,173 since last week
49.4% 2.8 (verified)
View hourly unverified
Sugarloaf 96,253 66,150
-1,388 since last week
68.7% N/A
View hourly unverified
Silvan 40,445 34,172
-444 since last week
84.5% N/A
View hourly unverified
Tarago 37,580 37,731
+3 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 25,738
-11 since last week
85.0% N/A
View hourly unverified
Greenvale 26,839 22,069
+209 since last week
82.2% N/A
View hourly unverified
Maroondah 22,179 12,978
+646 since last week
58.5% 3 (verified)
View hourly unverified
O'Shannassy 3,123 1,856
-267 since last week
59.4% 1 (verified)
View hourly unverified
Total 1,812,175 1,241,307
-3,260 since last week
68.5% 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

Show details [+]
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 10.2 27.7 -63.2% 45.4mm
Upper Yarra 2.8 28.2 -90.1% 53.8mm
O'Shannassy 1.0 39.2 -97.4% 87.4mm
Maroondah 3.0 28.2 -89.4% 37.2mm

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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 2,684 4,840 -44.5% 4,355
Upper Yarra 654 2,710 -75.9% 2,297
O'Shannassy 779 1,990 -60.9% 2,025
Maroondah 766 1,800 -57.4% 2,117
Total 4,883 11,340 56.9% 10,794

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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 143 143

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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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