Weekly water update

Data for week ending 26 March 2015
Last update at 4:00 PM 26 March 2015

Dam storage levels


1292.8 billion litres this week


Less than week ending 19 March 2015

Avg. catchment rainfall

10.7 mm

This week


More than week ending 19 March 2015

Flow into dams

1,507 ML

This week


More than week ending 19 March 2015

Water use

162 L

Daily avg. per person this week


Less than week ending 19 March 2015

Low rainfall, streamflow for catchments

Melbourne’s storage levels decreased by 0.5 % of capacity in the past week, representing a net loss of 9.2 billion litres.

The decline came after another week of low rainfall and streamflow.

The four major catchments received between 6.8 to 15.8 mm of rain, the average being 10.7 mm. This was 21.9 % below the long-term average for the period of 13.7 mm.

The effect of several weeks of low rainfall was reflected in below-average streamflow. The 1.5 billion litres that entered reservoirs was half the 30-year average for the period (3.0 billion litres).

Water storages are now 71.3% (1,292.8 billion litres) full, compared with 74.1% (1,343.1 billion litres) at the same time last year – a difference of 50.3 billion litres.

Melburnians used an average of 162 litres of water per person per day. This is 4 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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71.3% full at 26 March 2015

1,292,783 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 813,740
-7,954 since last week
76.2% 6.8 (verified)
View hourly unverified
Cardinia 286,911 175,060
-1,496 since last week
61.0% N/A
View hourly unverified
Upper Yarra 200,579 101,189
+1,940 since last week
50.4% 15.8 (verified)
View hourly unverified
Sugarloaf 96,253 80,151
-1,511 since last week
83.3% N/A
View hourly unverified
Silvan 40,445 34,878
-186 since last week
86.2% N/A
View hourly unverified
Tarago 37,580 36,242
-97 since last week
96.4% N/A
View hourly unverified
Yan Yean 30,266 25,646
-77 since last week
84.7% N/A
View hourly unverified
Greenvale 26,839 16,569
-1 since last week
61.7% N/A
View hourly unverified
Maroondah 22,179 6,721
+147 since last week
30.3% 13.2 (verified)
View hourly unverified
O'Shannassy 3,123 2,587
-29 since last week
82.8% 9.8 (verified)
View hourly unverified
Total 1,812,175 1,292,783
-9,264 since last week
71.3% 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 6.8 13.5 -49.6% 4.2mm
Upper Yarra 15.8 12.1 30.6% 6.4mm
O'Shannassy 9.8 14.9 -34.2% 2.0mm
Maroondah 13.2 18.1 -27.1% 3.0mm

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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 478 1,000 -52.2% 772
Upper Yarra 206 570 -63.9% 106
O'Shannassy 409 720 -43.2% 447
Maroondah 414 720 -42.5% 409
Total 1,507 3,010 49.9% 1,734

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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 162 166

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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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