Weekly water update

Data for week ending 21 September 2017
Last update at 4:00 PM 21 September 2017

Dam storage levels


1250.9 billion litres this week


More than week ending 14 September 2017

Avg. catchment rainfall

37 mm

This week


Less than week ending 14 September 2017

Flow into dams

36,933 ML

This week


More than week ending 14 September 2017

Water use

150 L

Daily avg. per person this week


More than week ending 14 September 2017

Storages continue to rise after more rain

Melbourne's storage levels increased by 1.7% of capacity this week, representing a net gain of 31.9 billion litres over the week.
The four major catchments received between 28.8 and 58.4 mm of rain, the average being 37.0 mm. This was 28.9% above the 30 year average for the period of 28.7 mm.
The 36.9 billion litres of stream flow was 73.8% above the 30 year average for the period (21.3 billion litres).
Water storages are now 69.0% (1,250.9 billion litres) full, compared with 67.7% (1,226.9 billion litres) at the same time last year   a difference of 24.0 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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69.0% full at 21 September 2017

1,250,933 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 693,249
+14,606 since last week
64.9% 35.2 (verified)
View hourly unverified
Cardinia 286,911 192,929
+29 since last week
67.2% N/A
View hourly unverified
Upper Yarra 200,579 135,518
+10,044 since last week
67.6% 34.6 (verified)
View hourly unverified
Sugarloaf 96,253 81,781
+2,995 since last week
85.0% N/A
View hourly unverified
Silvan 40,445 35,011
-282 since last week
86.6% N/A
View hourly unverified
Tarago 37,580 35,753
+728 since last week
95.1% N/A
View hourly unverified
Yan Yean 30,266 27,058
+104 since last week
89.4% N/A
View hourly unverified
Greenvale 26,839 25,562
+68 since last week
95.2% N/A
View hourly unverified
Maroondah 22,179 20,875
+3,581 since last week
94.1% 28.8 (verified)
View hourly unverified
O'Shannassy 3,123 3,197
0 since last week
100.0% 58.4 (verified)
View hourly unverified
Total 1,812,175 1,250,933
+31,873 since last week
69.0% 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 35.2 28.1 25.3% 20.4mm
Upper Yarra 34.6 27.1 27.7% 20.6mm
O'Shannassy 58.4 36.8 58.7% 28.4mm
Maroondah 28.8 27.1 6.3% 47.4mm

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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 14,921 9,020 65.4% 6,392
Upper Yarra 12,078 6,250 93.2% 3,919
O'Shannassy 6,047 3,340 81.0% 2,762
Maroondah 3,887 2,640 47.1% 2,748
Total 36,933 21,250 73.8% 15,821

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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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