Weekly water update

Data for week ending 18 September 2014
Last update at 5:00 PM 18 September 2014

Dam storage levels


1453.3 billion litres this week


More than week ending 11 September 2014

Avg. catchment rainfall

19.2 mm

This week


Less than week ending 11 September 2014

Flow into dams

9,676 ML

This week


Less than week ending 11 September 2014

Water use

144 L

Daily avg. per person this week


Less than week ending 11 September 2014

Dry week delivers small storage return

Melbourne’s water storage levels increased by 0.2% of capacity over the past week, representing a net gain of 2.9 billion litres.

Low rainfall and streamflow results meant the weekly gain was again below the spring average (0.5%).

The four major catchments received between 15 to 22.6 mm of rain, the average being 19.2 mm. This was 43% below the long-term average for the period of 33.8 mm.

The 9.7 billion litres of stream flow that entered reservoirs was 55% below the 30-year average for the period (21.5 billion litres).

Water storages are now 80.2% (1,453.3 billion litres) full, compared with 77.6% (1,406.8 billion litres) at the same time last year – a difference of 46.5 billion litres.

Melburnians used an average of 145 litres of water per person per day. This is 4 litres less than the previous week.

Permanent water use rules are currently in place. Visit water.vic.gov.au for information on water use rules and tips on how to save water.

The Victorian Government is helping everyone choose the right water for the job. Using alternative water sources, such as rainwater from our roofs, reduces our reliance on drinking water supplies.

Visit rightwater.vic.gov.au for more information.


Dam storage levels

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80.2% full at 18 September 2014

1,453,266 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 888,049
+3,241 since last week
83.2% 17.2 (verified)
View hourly unverified
Cardinia 286,911 187,272
-76 since last week
65.3% N/A
View hourly unverified
Upper Yarra 200,579 138,580
-2,019 since last week
69.1% 22.6 (verified)
View hourly unverified
Sugarloaf 96,253 94,122
+130 since last week
97.8% N/A
View hourly unverified
Silvan 40,445 36,342
+1,526 since last week
89.9% N/A
View hourly unverified
Tarago 37,580 37,860
+36 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 27,594
+172 since last week
91.2% N/A
View hourly unverified
Greenvale 26,839 18,174
+14 since last week
67.7% N/A
View hourly unverified
Maroondah 22,179 22,219
-60 since last week
100.0% 15 (verified)
View hourly unverified
O'Shannassy 3,123 3,054
-82 since last week
97.8% 21.8 (verified)
View hourly unverified
Total 1,812,175 1,453,266
+2,882 since last week
80.2% 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 17.2 36.5 -52.9% 28.2mm
Upper Yarra 22.6 29.4 -23.1% 24.8mm
O'Shannassy 21.8 39.3 -44.5% 31.2mm
Maroondah 15.0 28.8 -47.9% 32.6mm

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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 3,961 9,280 -57.3% 4,270
Upper Yarra 2,356 6,110 -61.4% 2,758
O'Shannassy 1,827 3,460 -47.2% 2,123
Maroondah 1,532 2,670 -42.6% 1,571
Total 9,676 21,520 55% 10,722

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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 144 149

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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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