Weekly water update

Data for week ending 30 April 2015
Last update at 10:00 AM 01 May 2015

Dam storage levels


1261.3 billion litres this week


Less than week ending 23 April 2015

Avg. catchment rainfall

21.4 mm

This week


Less than week ending 23 April 2015

Flow into dams

4,781 ML

This week


More than week ending 23 April 2015

Water use

145 L

Daily avg. per person this week


Less than week ending 23 April 2015

Average autumn week for dams

Melbourne dam levels decreased by 0.3 % of capacity over the past week, representing a net loss of 5.5 billion litres.
This included three billion litres of water released from Thomson Reservoir for the Thomson River to aid migration and spawning of the endangered Australian grayling.
The four major catchments received between 16.4 to 27.6 mm of rain, the average being 21.4 mm. This was 1.4 % below the long-term average for the period of 21.8 mm.
Rainfall performance was mirrored in the streamflow results.
The 4.8 billion litres of stream flow was also 1.4% below the 30-year average for the period (4.9 billion litres).
Water storages are now 69.6% (1,261.3 billion litres) full, compared with 72.8% (1,319.5 billion litres) at the same time last year – a difference of 58.2 billion litres.
Melburnians used an average of 145 litres of water per person per day. This is 6 litres less than 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

Hide details [-]

69.6% full at 30 April 2015

1,261,304 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 781,632
-7,978 since last week
73.2% 17.8 (verified)
View hourly unverified
Cardinia 286,911 173,289
+327 since last week
60.4% N/A
View hourly unverified
Upper Yarra 200,579 107,090
+1,919 since last week
53.4% 27.6 (verified)
View hourly unverified
Sugarloaf 96,253 74,038
-334 since last week
76.9% N/A
View hourly unverified
Silvan 40,445 35,637
+201 since last week
88.1% N/A
View hourly unverified
Tarago 37,580 36,392
+161 since last week
96.8% N/A
View hourly unverified
Yan Yean 30,266 25,493
+35 since last week
84.2% N/A
View hourly unverified
Greenvale 26,839 18,758
+699 since last week
69.9% N/A
View hourly unverified
Maroondah 22,179 7,003
-314 since last week
31.6% 16.4 (verified)
View hourly unverified
O'Shannassy 3,123 1,972
-209 since last week
63.1% 23.4 (verified)
View hourly unverified
Total 1,812,175 1,261,304
-5,493 since last week
69.6% N/A

Download this data (.CSV)

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

Show details [+]
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 17.8 23.0 -20.9% 10.6mm
Upper Yarra 27.6 20.0 40.8% 33.4mm
O'Shannassy 23.4 24.0 -0.8% 45.8mm
Maroondah 16.4 23.0 -29.3% 45.6mm

Download this data (.CSV)

Rainfall data is a weighted average catchment figure that is validated and provided for four major catchments only.

Flow into dams

Show details [+]
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 3,058 2,070 47.7% 1,266
Upper Yarra 358 980 -63.5% 359
O'Shannassy 382 880 -56.6% 593
Maroondah 983 920 6.8% 876
Total 4,781 4,850 1.4% 3,094

Download this data (.CSV)

Flow into dams is a total of water flowing from our four major catchments into reservoirs.

Water use for Melbourne

Show details [+]
Daily water use This week's daily average (L) Last week's daily average (L)
Per Person Water Use 145 151

Download this data (.CSV)

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.

Copyright Melbourne Water