Sugarloaf Reservoir

Sugarloaf Reservoir supplies the northern, eastern and central suburbs of Melbourne. It can store water pumped from the Yarra River and Maroondah Reservoir, and up to 75 billion litres of water a year from the Goulburn River via the North-South Pipeline (when in operation).

The water from Sugarloaf Reservoir flows out to service reservoirs in northern and eastern suburbs, typically from Whittlesea to Eltham. When mixed with water from Silvan Reservoir, water from Sugarloaf is supplied even further out west to suburbs such as St Albans and Werribee.

Key facts

The dam at Sugarloaf Reservoir is a rolled rockfill embankment with upstream concrete face, and was completed in 1981.

Water from Sugarloaf is fully treated at the nearby Winneke Water Treatment Plant, which provides about a quarter of Melbourne’s drinking water.

Sugarloaf Reservoir

  • Catchment area: 915 hectares (off-stream storage)
  • Surface area: 440 hectares
  • Total capacity: 96,253 megalitres
  • Dam height: 89 metres
  • Dam length: 1,050 metres (main bank only, saddle dams are are an extra 690 metres)

Rainfall over the years

View highlights from our historical rainfall data for Sugarloaf Reservoir, including annual rainfall, monthly averages, and the wettest and driest years by month.

Live rainfall and water storage data

Get the latest information on each of our 10 major reservoirs, including daily water storage levels and hourly rainfall and river level data.

Annual rainfall at Sugarloaf (1982-2021)

Graph of annual rainfall (mm) at Sugarloaf Reservoir, 1982-2021

Monthly rainfall records (mm)

Last updated: January 2022

Month Wettest Driest Average
January​ 113.4 (1995)​ 1.8 (2009)​ 52.1
February​ 171.2 (2011)​ 0.0 (1991)​ 46.2
March​ 116.2 (1989)​ 14.4 (2005)​ 47.7
April​ 166.4 (2020)​ 13.8 (2019)​ 62.7
May​ 127.6 (1987)​ 18.2 (2005)​ 62.8
June​ 131.8 (1991)​ 20.4 (2006)​ 66.8
July​ 101.8 (1986)​ 16.0 (2001)​ 58.5
August​ 106.8 (1990)​ ​25.0 (2007) 67.4
September​ ​163.0 (1992) 18.6 (2018) 74.3
October​ ​153.0 (2010) ​12.8 (2006) 72.0
November​ ​181.6 (2004) ​12.8 (1982) 72.4
December​ ​195.0 (1985) 5.8 (2019) 70.0
Annual total 1056.4 (2011)​ 519.6 (1997)​ 752.9
Last updated:
14 February 2022