Weekly water update

Data for week ending 20 November 2014
Last update at 4:00 PM 20 November 2014

Dam storage levels


1431.0 billion litres this week


Less than week ending 13 November 2014

Avg. catchment rainfall

34.3 mm

This week


More than week ending 13 November 2014

Flow into dams

6,117 ML

This week


More than week ending 13 November 2014

Water use

180 L

Daily avg. per person this week


Less than week ending 13 November 2014

Above-average rain slows storage decline

Above-average rain helped slow the storage decline this week, with dam levels dropping 0.1% of capacity, or 2.6 billion litres.

The four major catchments received between 32 and 35 mm of rain, the average being 34.3 mm.

This was 69.1% above the long-term average for the period (20.3 mm).

Not all of the rain translated into storage gains, with a lot soaking into catchment soils, still dry from previous weeks.

The 6.1 billion litres of stream flow was 43.8 % below the 30-year average for the period (10.9 billion litres).

Water storages are now 79.0% (1,431.0 billion litres) full, compared with 80.8% (1,464.5 billion litres) at the same time last year – a difference of 33.5 billion litres.

Melburnians used an average of 180 litres of water per person per day.

This is 21 litres less 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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79.0% full at 20 November 2014

1,430,966 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 873,098
-5,580 since last week
81.8% 35 (verified)
View hourly unverified
Cardinia 286,911 183,746
+415 since last week
64.0% N/A
View hourly unverified
Upper Yarra 200,579 144,379
+2,885 since last week
72.0% 34.2 (verified)
View hourly unverified
Sugarloaf 96,253 91,609
-85 since last week
95.2% N/A
View hourly unverified
Silvan 40,445 34,755
-278 since last week
85.9% N/A
View hourly unverified
Tarago 37,580 37,853
+125 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 27,630
+52 since last week
91.3% N/A
View hourly unverified
Greenvale 26,839 17,670
+49 since last week
65.8% N/A
View hourly unverified
Maroondah 22,179 17,952
-237 since last week
80.9% 33.6 (verified)
View hourly unverified
O'Shannassy 3,123 2,274
+24 since last week
72.8% 32 (verified)
View hourly unverified
Total 1,812,175 1,430,966
-2,630 since last week
79.0% 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 35.0 19.7 77.7% 14.4mm
Upper Yarra 34.2 20.5 66.8% 17.8mm
O'Shannassy 32.0 21.6 48.1% 22.0mm
Maroondah 33.6 20.6 63.1% 26.8mm

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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 2,920 4,390 -33.5% 6,091
Upper Yarra 888 2,800 -68.3% 2,962
O'Shannassy 1,139 1,990 -42.8% 2,482
Maroondah 1,170 1,710 -31.6% 3,577
Total 6,117 10,890 43.8% 15,112

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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 180 201

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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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