Weekly water update

Data for week ending 17 August 2017
Last update at 5:00 PM 17 August 2017

Dam storage levels


1153.0 billion litres this week


More than week ending 10 August 2017

Avg. catchment rainfall

49.5 mm

This week


More than week ending 10 August 2017

Flow into dams

16,781 ML

This week


More than week ending 10 August 2017

Water use

150 L

Daily avg. per person this week


More than week ending 10 August 2017

Slight storage increase as rain continues

Melbourne's storage levels increased by 0.6% of capacity this week, representing a net gain of 12.0 billion litres over the week.

The four major catchments received between 5.8 and 66.2 mm of rain, the average being 49.5 mm.  This was 72.5% above the 30 year average for the period of 28.7 mm.

The 16.8 billion litres of stream flow was 12.6% below the 30 year average for the period (19.2 billion litres).

Water storages are now 63.6% (1,153.0 billion litres) full, compared with 64.8% (1,175.1 billion litres) at the same time last year   a difference of 22.2 billion litres.

Melburnians used an average of 150 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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63.6% full at 17 August 2017

1,152,973 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 645,608
+6,345 since last week
60.5% 43.4 (verified)
View hourly unverified
Cardinia 286,911 195,366
-882 since last week
68.1% N/A
View hourly unverified
Upper Yarra 200,579 108,059
+3,384 since last week
53.9% 65.8 (verified)
View hourly unverified
Sugarloaf 96,253 67,920
+1,423 since last week
70.6% N/A
View hourly unverified
Silvan 40,445 34,457
-199 since last week
85.2% N/A
View hourly unverified
Tarago 37,580 33,558
+86 since last week
89.3% N/A
View hourly unverified
Yan Yean 30,266 26,694
+155 since last week
88.2% N/A
View hourly unverified
Greenvale 26,839 24,837
+202 since last week
92.5% N/A
View hourly unverified
Maroondah 22,179 13,314
+1,510 since last week
60.0% 5.8 (verified)
View hourly unverified
O'Shannassy 3,123 3,160
-18 since last week
100.0% 66.2 (verified)
View hourly unverified
Total 1,812,175 1,152,973
+12,006 since last week
63.6% 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 43.4 27.2 59.6% 5.8mm
Upper Yarra 65.8 29.2 125.3% 17.8mm
O'Shannassy 66.2 37.7 75.6% 27.6mm
Maroondah 5.8 23.9 -75.7% 8.6mm

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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 7,754 8,040 -3.6% 5,162
Upper Yarra 4,615 5,520 -16.4% 3,544
O'Shannassy 2,610 3,170 -17.7% 3,163
Maroondah 1,802 2,470 -27.0% 1,932
Total 16,781 19,200 12.6% 13,801

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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 150 147

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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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