Weekly water update

Data for week ending 08 October 2015
Last update at 8:00 PM 08 October 2015

Dam storage levels


1344.4 billion litres this week


Less than week ending 01 October 2015

Avg. catchment rainfall

0 mm

This week


Less than week ending 01 October 2015

Flow into dams

5,635 ML

This week


Less than week ending 01 October 2015

Water use

182 L

Daily avg. per person this week


More than week ending 01 October 2015

Hot, dry weather sees storages drop

Melbourne’s water storages have been affected by the prolonged warm and dry weather, with the city’s water storages decreasing by 5.7 billion litres over the past week.

The 0.3% decline is highly unusual for this time of year, when storages typically increase by 0.3%.

No rain fell over the four major catchments (Thomson, Upper Yarra, Maroondah and O’Shannassy).

This was 100% below the long-term average for the period of 23.4 mm.

It is the first time that no rainfall has been recorded in a week in October since consolidated rainfall records began in 1969.

The dry conditions over the past week continued to limit runoff into the reservoirs.

The 5.6 billion litres of stream flow was 65.8% below the 30-year average for the period (16.5 billion litres).

Water storages are now 74.2% (1,344.4 billion litres) full, compared with 80.5% (1,457.9 billion litres) at the same time last year - a difference of 113.5 billion litres.

Melbournians used an average of 182 litres of water per person per day.

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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74.2% full at 08 October 2015

1,344,368 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 810,872
-5,563 since last week
75.9% 0 (verified)
View hourly unverified
Cardinia 286,911 174,556
-1,282 since last week
60.8% N/A
View hourly unverified
Upper Yarra 200,579 117,791
+287 since last week
58.7% 0 (verified)
View hourly unverified
Sugarloaf 96,253 91,144
+1,269 since last week
94.7% N/A
View hourly unverified
Silvan 40,445 35,374
-31 since last week
87.5% N/A
View hourly unverified
Tarago 37,580 37,645
-90 since last week
100.0% N/A
View hourly unverified
Yan Yean 30,266 26,710
+68 since last week
88.3% N/A
View hourly unverified
Greenvale 26,839 25,880
-181 since last week
96.4% N/A
View hourly unverified
Maroondah 22,179 22,219
-40 since last week
100.0% 0 (verified)
View hourly unverified
O'Shannassy 3,123 2,177
-121 since last week
69.7% 0 (verified)
View hourly unverified
Total 1,812,175 1,344,368
-5,684 since last week
74.2% 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 0.0 22.0 -100.0% 15.4mm
Upper Yarra 0.0 24.0 -100.0% 26.0mm
O'Shannassy 0.0 30.0 -100.0% 23.6mm
Maroondah 0.0 21.0 -100.0% 15.0mm

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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 2,814 6,950 -59.5% 3,596
Upper Yarra 1,256 4,380 -71.3% 2,378
O'Shannassy 1,077 2,990 -64.0% 1,597
Maroondah 488 2,140 -77.2% 1,440
Total 5,635 16,460 65.8% 9,011

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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 182 154

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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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