Weekly water update

Data for week ending 28 July 2016
Last update at 5:00 PM 28 July 2016

Dam storage levels


1133.2 billion litres this week


More than week ending 21 July 2016

Avg. catchment rainfall

51.4 mm

This week


More than week ending 21 July 2016

Flow into dams

23,705 ML

This week


More than week ending 21 July 2016

Water use

134 L

Daily avg. per person this week


Less than week ending 21 July 2016

Extra rain sees reservoirs gain

Melbourne’s water storages increased by 1.1% of capacity during the past week, representing a net gain of 21.0 billion litres over the week.

The result is double the four-year average weekly increase during winter of 0.55%.

The good rain and streamflow has brought water storages to 62.5% (1,133.2 billion litres) full, compared with 69.3% (1,256.6 billion litres) at the same time last year, a difference of 123.4 billion litres.

The four major catchments received between 28.2 to 76 mm of rain, the average being 51.4 mm.

This was 139.1% above the long-term average for the period of 21.5 mm.

The 23.7 billion litres of stream flow was 62.0% above the 30-year average for the period (14.6 billion litres).

Melburnians used an average of 134 litres of water per person per day, 10 litres less 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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62.5% full at 28 July 2016

1,133,201 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 631,608
+12,510 since last week
59.1% 50.4 (verified)
View hourly unverified
Cardinia 286,911 183,125
+179 since last week
63.8% N/A
View hourly unverified
Upper Yarra 200,579 105,541
-390 since last week
52.6% 51.4 (verified)
View hourly unverified
Sugarloaf 96,253 76,633
+3,265 since last week
79.6% N/A
View hourly unverified
Silvan 40,445 36,374
+2,193 since last week
89.9% N/A
View hourly unverified
Tarago 37,580 35,824
+704 since last week
95.3% N/A
View hourly unverified
Yan Yean 30,266 24,503
+140 since last week
81.0% N/A
View hourly unverified
Greenvale 26,839 22,439
+402 since last week
83.6% N/A
View hourly unverified
Maroondah 22,179 13,960
+1,643 since last week
62.9% 28.2 (verified)
View hourly unverified
O'Shannassy 3,123 3,194
+360 since last week
100.0% 76 (verified)
View hourly unverified
Total 1,812,175 1,133,201
+21,006 since last week
62.5% 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 50.4 20.7 143.5% 2.2mm
Upper Yarra 51.4 21.5 139.1% 14.6mm
O'Shannassy 76.0 28.4 167.6% 20.6mm
Maroondah 28.2 17.8 58.4% 13.0mm

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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 12,824 6,380 101.0% 6,867
Upper Yarra 4,937 3,830 28.9% 6,220
O'Shannassy 3,639 2,460 47.9% 3,541
Maroondah 2,305 1,960 17.6% 3,165
Total 23,705 14,630 62% 19,793

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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 134 144

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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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