Weekly water update

Data for week ending 25 May 2017
Last update at 5:00 PM 25 May 2017

Dam storage levels


1149.0 billion litres this week


Less than week ending 18 May 2017

Avg. catchment rainfall

1.7 mm

This week


More than week ending 18 May 2017

Flow into dams

2,360 ML

This week


Less than week ending 18 May 2017

Water use

144 L

Daily avg. per person this week


Less than week ending 18 May 2017

Dams dip as dry spell continues

Melbourne’s storage levels decreased by 0.3% of capacity this week, representing a net loss of 5.1 billion litres over the week.

The four major catchments received between 0.0 and 2.2 mm of rain, the average being 1.7 mm.  This was 90.9% below the long term average for the period of 18.6 mm.

The 2.4 billion litres of stream flow was 53.7% below the 30 year average for the period (5.1 billion litres).
Water storages are now 63.4% (1,149.0 billion litres) full, compared with 58.8% (1,065.7 billion litres) at the same time last year – a difference of 83.4 billion litres.

Melburnians used an average of 144 litres of water per person per day.  This is 2 litres less than the previous week.
Permanent water use rules are currently in place and Target 155 has been launched to encourage Melburnians to reduce water consumption.

Information on Target 155 is available on the Department of Environment, Land, Water and Planning's website or by contacting your local water retailer.

Dam storage levels

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63.4% full at 25 May 2017

1,149,048 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 658,983
-6,196 since last week
61.7% 1.8 (verified)
View hourly unverified
Cardinia 286,911 180,976
+1,211 since last week
63.1% N/A
View hourly unverified
Upper Yarra 200,579 107,648
+2,214 since last week
53.7% 2.2 (verified)
View hourly unverified
Sugarloaf 96,253 74,261
-1,795 since last week
77.2% N/A
View hourly unverified
Silvan 40,445 34,323
-401 since last week
84.9% N/A
View hourly unverified
Tarago 37,580 32,969
+89 since last week
87.7% N/A
View hourly unverified
Yan Yean 30,266 26,335
-41 since last week
87.0% N/A
View hourly unverified
Greenvale 26,839 21,889
-228 since last week
81.6% N/A
View hourly unverified
Maroondah 22,179 9,657
+288 since last week
43.5% 0 (verified)
View hourly unverified
O'Shannassy 3,123 2,007
-129 since last week
64.3% 1.4 (verified)
View hourly unverified
Total 1,812,175 1,149,048
-4,988 since last week
63.4% 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 1.8 18.0 -89.9% 9.6mm
Upper Yarra 2.2 19.0 -88.4% 17.4mm
O'Shannassy 1.4 22.0 -93.7% 35.6mm
Maroondah 0.0 17.0 -100.0% 9.2mm

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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 906 2,170 -58.2% 1,448
Upper Yarra 525 920 -42.9% 126
O'Shannassy 479 1,010 -52.6% 652
Maroondah 450 1,000 -55.0% 608
Total 2,360 5,100 53.7% 2,834

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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 144 146

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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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