Weekly water update

Data for week ending 27 August 2015
Last update at 3:00 PM 27 August 2015

Dam storage levels


1305.0 billion litres this week


More than week ending 20 August 2015

Avg. catchment rainfall

23.4 mm

This week


More than week ending 20 August 2015

Flow into dams

11,664 ML

This week


Less than week ending 20 August 2015

Water use

148 L

Daily avg. per person this week


More than week ending 20 August 2015

Melbourne's storages continue winter rise

Melbourne’s water storage levels have increased by 0.4% of capacity over the past week, representing a net gain of 7.5 billion litres.

The four major catchments in Melbourne’s water supply system received between 11.0 to 28.4 mm of rain, the average being 23.4 mm.

This was 3.2% below the long-term average for the period of 24.2 mm.

Runoff into the reservoirs was below average for the second week in a row.

The 11.7 billion litres of stream flow was 37.5% below the 30-year average for the period (18.7 billion litres).

Water storages are now 72.0% (1,305.0 billion litres) full, compared with 79.6% (1,442.5 billion litres) at the same time last year - a difference of 137.5 billion litres.

Melburnians used an average of 148 litres of water per person per day.

This is 2 litres more than the water usage by Melbourne residents during the previous week.

Permanent water use rules are currently in place. View water use rules and water saving tips or contact your local water retailer for advice.


Dam storage levels

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72.0% full at 27 August 2015

1,305,045 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 795,683
+4,719 since last week
74.5% 28.4 (verified)
View hourly unverified
Cardinia 286,911 172,028
-99 since last week
60.0% N/A
View hourly unverified
Upper Yarra 200,579 114,976
-1,264 since last week
57.3% 22.8 (verified)
View hourly unverified
Sugarloaf 96,253 73,145
+3,843 since last week
76.0% N/A
View hourly unverified
Silvan 40,445 35,095
+1,194 since last week
86.8% N/A
View hourly unverified
Tarago 37,580 37,817
-43 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 26,233
0 since last week
86.7% N/A
View hourly unverified
Greenvale 26,839 25,845
+224 since last week
96.3% N/A
View hourly unverified
Maroondah 22,179 21,541
-598 since last week
97.1% 11 (verified)
View hourly unverified
O'Shannassy 3,123 2,682
-409 since last week
85.9% 15.4 (verified)
View hourly unverified
Total 1,812,175 1,305,045
+7,567 since last week
72.0% 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 28.4 22.0 29.1% 10.0mm
Upper Yarra 22.8 24.6 -7.3% 5.4mm
O'Shannassy 15.4 33.7 -54.3% 6.8mm
Maroondah 11.0 22.0 -50.0% 14.6mm

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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 5,202 7,770 -33.1% 5,330
Upper Yarra 3,108 5,260 -40.9% 3,516
O'Shannassy 1,786 3,210 -44.4% 2,401
Maroondah 1,568 2,430 -35.5% 1,744
Total 11,664 18,670 37.5% 12,991

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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 148 146

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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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