Maroondah Reservoir

Maroondah Reservoir is filled by rainfall received by the surrounding catchments. It transfers water to Sugarloaf Reservoir and onwards to Melbourne’s northern, western and inner suburbs.

When the reservoir overflows, water spills into the Yarra River. Some of this water can be pumped back out into Sugarloaf Reservoir.

Key facts

The dam at Maroondah Reservoir is a concrete gravity dam, and was completed in 1927.

Learn more about its history and explore 360-degree panaromas with the Maroondah water supply system virtual tour.

Aerial view of Maroondah Reservoir and spillway

  • Catchment area: 10,400 hectares
  • Surface area: 200 hectares
  • Total capacity: 22,179 megalitres
  • Dam height: 41 metres
  • Dam length: 291 metres
     

Rainfall over the years

View highlights from our historical rainfall data for Maroondah 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 Maroondah (1893-2021)

Graph of annual rainfall (mm) at Maroondah Reservoir, 1893-2021

Monthly rainfall records (mm)

Last updated: January 2022

Month Wettest Driest Average
January​ 231.2 (1897)​ 2.6 (1930)​ 68.9
February​ 243.3 (1946)​ 1.2 (2009)​ 63.6
March​ 241.8 (1931)​ 1.1 (1951) 74.6
April​ ​297.3 (1935) 0.0 (1923)​ 91.6
May​ 252.2 (1944)​ 7.4 (1934)​ 102.7
June​ 286.8 (1911)​ 15.2 (1972)​ 104.3
July​ 225.8 (1952)​ 35.2 (2001)​ 102.9
August​ 262.9 (1939)​ 32.0 (1982)​ 113.8
September​ 224.9 (1916)​ 35.6 (1961)​ 114.5
October​ 316.1 (1937)​ 4.7 (1914)​ 116.2
November​ 239.6 (2004)​ 18.8 (1895)​ 100.5
December​ 257.8 (1930)​ 4.6 (1972)​ 93.3
Annual total 1702.8 (1952)​ 652.3 (1997)​ 1147.7
Last updated:
28 January 2022