The Blue Lake

Mount Gambier is famous for its 'Blue Lake' which changes colour dramatically each year. The Blue Lake is just one of the lakes within the three craters of the volcano.

Blue Lake Watercare

An ongoing partnership between the South East Natural Resources Management Board and the City of Mount Gambier. more

Management Committee

The Blue Lake Management Committee is a sub-committee of the SE NRM Board and has representation from the Board. more

Links & Publications

Go here for all the links & documents you need to gather information about the Blue Lake Water Care and the Blue Lake Management Committee. more

The Blue Lake is the drinking water for the city

Situated in one of three extinct volcanic craters, the Blue Lake exposes the crystal clear water that has filtered underground through the limestone, passing slowly beneath the city.

Each year in November the lake starts its colour change from winter steel blue to brilliant turquoise blue and then in March changes back to steel blue.

With average depths of 70 metres, the lake contains 36,000 million litres (ML). It is the source of water to the city 3,500 ML is pumped annually from the lake into holding tanks which gravity feed water to the city and surrounds. No swimming or diving is permitted.

The Blue Lake and the Crater Lakes area is a significant site within the Kanawinka Geopark and is a State Heritage Area.