Weekly water update

Data for week ending 23 March 2017
Last update at 5:00 PM 23 March 2017

Dam storage levels


1185.0 billion litres this week


Less than week ending 16 March 2017

Avg. catchment rainfall

25.4 mm

This week


More than week ending 16 March 2017

Flow into dams

3,157 ML

This week


More than week ending 16 March 2017

Water use

181 L

Daily avg. per person this week


Less than week ending 16 March 2017

Storages drop despite good rainfall

Dam levels decreased by 0.4% of capacity, representing a net loss of 7.7 billion litres over the week.

The four major catchments received between 19.0 to 27.8 mm of rain, the average being 25.4 mm.  This was 68.2% above the long term average for the period of 15.1 mm.

The 3.2 billion litres of stream flow was 6.7% above the 30 year average for the period (3.0 billion litres).

Water storages are now 65.4% (1,185.0 billion litres) full, compared with 62.5% (1,132.9 billion litres) at the same time last year   a difference of 52.1 billion litres.

Melbournians used an average of 181 litres of water per person per day.  This is 29 litres less than the previous week.

Permanent water use rules are currently in place and Target 155 has been launched to encourage Melbournians 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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65.4% full at 23 March 2017

1,184,990 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 705,735
-6,829 since last week
66.1% 27 (verified)
View hourly unverified
Cardinia 286,911 168,590
-89 since last week
58.8% N/A
View hourly unverified
Upper Yarra 200,579 97,335
-9 since last week
48.5% 24.2 (verified)
View hourly unverified
Sugarloaf 96,253 79,793
-477 since last week
82.9% N/A
View hourly unverified
Silvan 40,445 35,485
+390 since last week
87.7% N/A
View hourly unverified
Tarago 37,580 33,472
-291 since last week
89.1% N/A
View hourly unverified
Yan Yean 30,266 26,274
+92 since last week
86.8% N/A
View hourly unverified
Greenvale 26,839 23,999
-201 since last week
89.4% N/A
View hourly unverified
Maroondah 22,179 12,246
-353 since last week
55.2% 19 (verified)
View hourly unverified
O'Shannassy 3,123 2,061
+37 since last week
66.0% 27.8 (verified)
View hourly unverified
Total 1,812,175 1,184,990
-7,730 since last week
65.4% 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 27.0 14.2 90.1% 60.0mm
Upper Yarra 24.2 14.7 64.6% 58.8mm
O'Shannassy 27.8 19.0 46.3% 91.4mm
Maroondah 19.0 16.6 14.5% 44.4mm

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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 1,251 1,020 22.6% 1,906
Upper Yarra 453 520 -12.9% 55
O'Shannassy 506 730 -30.7% 748
Maroondah 947 690 37.2% 987
Total 3,157 2,960 6.7% 3,696

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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 181 210

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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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