Weekly water update

Data for week ending 20 July 2017
Last update at 5:00 PM 20 July 2017

Dam storage levels


1123.9 billion litres this week


Less than week ending 13 July 2017

Avg. catchment rainfall

29.7 mm

This week


More than week ending 13 July 2017

Flow into dams

4,584 ML

This week


More than week ending 13 July 2017

Water use

151 L

Daily avg. per person this week


More than week ending 13 July 2017

Storages slightly down as dry spell continues

Melbourne's storage levels decreased by 0.1% of capacity this week.

The four major catchments received between 18.2 and 42.0 mm of rain, the average being 29.7 mm. This was 28.6% above the 30 year average for the period of 23.1 mm.

The 4.6 billion litres of stream flow was 66.1% below the 30 year average for the period (13.5 billion litres).

Water storages are now 62.0% (1,123.9 billion litres) full, compared with 61.3% (1,111.4 billion litres) at the same time last year - a difference of 12.5 billion litres.

Melburnians used an average of 151 litres of water per person per day. This is 3 litres more 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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62.0% full at 20 July 2017

1,123,933 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 639,474
-1,590 since last week
59.9% 18.2 (verified)
View hourly unverified
Cardinia 286,911 194,389
+1,780 since last week
67.8% N/A
View hourly unverified
Upper Yarra 200,579 96,944
-133 since last week
48.3% 40.8 (verified)
View hourly unverified
Sugarloaf 96,253 65,942
-590 since last week
68.5% N/A
View hourly unverified
Silvan 40,445 33,901
-241 since last week
83.8% N/A
View hourly unverified
Tarago 37,580 33,164
+58 since last week
88.2% N/A
View hourly unverified
Yan Yean 30,266 26,513
+152 since last week
87.6% N/A
View hourly unverified
Greenvale 26,839 23,604
+363 since last week
87.9% N/A
View hourly unverified
Maroondah 22,179 6,942
-739 since last week
31.3% 34 (verified)
View hourly unverified
O'Shannassy 3,123 3,060
+410 since last week
98.0% 42 (verified)
View hourly unverified
Total 1,812,175 1,123,933
-530 since last week
62.0% 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 18.2 21.4 -15.0% 3.2mm
Upper Yarra 40.8 22.7 79.7% 0.6mm
O'Shannassy 42.0 31.4 33.8% 3.4mm
Maroondah 34.0 22.7 49.8% 1.8mm

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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 1,865 5,710 -67.3% 7,367
Upper Yarra 921 3,550 -74.1% 3,470
O'Shannassy 1,182 2,300 -48.6% 2,163
Maroondah 616 1,950 -68.4% 1,733
Total 4,584 13,510 66.1% 14,733

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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 151 148

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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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