Central to the South East is the regional centre Mount Gambier. It is supplied primarily by the Blue Lake.
Not only is the Blue Lake the primary source of water, it is perhaps one of South Australia's most unique and fascinating natural phenomena. Its unusual depth, source of water and bright blue colour have all attracted much speculation and scientific research.
Formed by volcanic eruption 4,800 years ago, the Blue Lake is about 75 m deep. It has a surface area of 70 hectares. The lake is connected to a large underground aquifer that feeds into, and continually replenishes, the lake with clear, clean water. In fact, water from the Blue Lake is so clean that it needs only minimal doses of chlorine to ensure it's safe to drink.
From the Blue Lake, a pumping station delivers water to two large water tanks: one at Potters Point and one at Keegan Drive. The water from these tanks is gravity-fed to supply water to the regional centre.
SA Water also serves the Murray Mallee area, south of Tailem Bend. The Tailem Bend to Keith pipeline supplies the upper area of this region with water from the River Murray. The rest of the region is served mostly from underground water supplies.
Water security plans for South East
Our Water Security Plan and this brochure, SA Water Across the State: South East gives you more information about our history and plans for a secure, reliable and high quality water service to the region.