Weekly water update

Data for week ending 29 September 2016
Last update at 4:00 PM 29 September 2016

Dam storage levels


1235.5 billion litres this week


More than week ending 22 September 2016

Avg. catchment rainfall

25.2 mm

This week


More than week ending 22 September 2016

Flow into dams

14,248 ML

This week


Less than week ending 22 September 2016

Water use

140 L

Daily avg. per person this week


More than week ending 22 September 2016

Streamflow remains below average 

Melbourne’s storage levels increased by 0.4% of capacity this week, representing a net gain of 7.6 billion litres over the week. This is the lowest weekly increase since June.

The four major catchments received between 12.2 and 43.6 mm of rain, the average being 25.2 mm.

This was 7.0% below the long-term average for the period (27.1 mm).
The 14.2 billion litres of stream flow was 22.0% below the 30-year average for the period (18.3 billion litres).

Water storages are now 68.2% (1,235.5 billion litres) full, compared with 74.5% (1,350.2 billion litres) at the same time last year – a difference of 114.7 billion litres.

Melburnians used an average of 140 litres of water per person per day.
This is 6 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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68.2% full at 29 September 2016

1,235,526 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 684,776
+5,364 since last week
64.1% 12.2 (verified)
View hourly unverified
Cardinia 286,911 182,523
-620 since last week
63.6% N/A
View hourly unverified
Upper Yarra 200,579 123,143
+2,342 since last week
61.4% 34.4 (verified)
View hourly unverified
Sugarloaf 96,253 94,775
-261 since last week
98.5% N/A
View hourly unverified
Silvan 40,445 35,219
+248 since last week
87.1% N/A
View hourly unverified
Tarago 37,580 37,745
+35 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 26,325
+306 since last week
87.0% N/A
View hourly unverified
Greenvale 26,839 25,604
+220 since last week
95.4% N/A
View hourly unverified
Maroondah 22,179 22,259
0 since last week
100.0% 43.6 (verified)
View hourly unverified
O'Shannassy 3,123 3,157
+10 since last week
100.0% 36.2 (verified)
View hourly unverified
Total 1,812,175 1,235,526
+7,644 since last week
68.2% 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 12.2 26.0 -53.1% 19.0mm
Upper Yarra 34.4 27.4 25.5% 28.4mm
O'Shannassy 36.2 32.6 11.0% 9.6mm
Maroondah 43.6 25.0 74.4% 16.0mm

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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 5,773 7,770 -25.7% 4,212
Upper Yarra 4,036 5,100 -20.9% 2,669
O'Shannassy 2,494 3,050 -18.2% 1,546
Maroondah 1,945 2,350 -17.2% 1,310
Total 14,248 18,270 22% 9,737

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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 140 134

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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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