South East

South East

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.

South East Region Quick Facts

  • Towns serviced: 33
  • Area of region: 36,580 square kilometres
  • Water mains: 1760 kilometres
  • Wastewater mains: 360 kilometres
  • Reservoirs: 1
  • Water Tanks: 48
  • Water Pumping Stations: 29
  • Wastewater Treatment Plants: 5
  • Water Treatment Plants: 1

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  • Major faults

  • Underway

  • Laurel Av
  • Campbelltown
  • 20/09/2018
  • Water Supply On
  • 20/09/2018 01:23 PM - We are attending to an incident in Campbelltown with no interruption to the water supply. The safety of our crews and customers comes first, and we always aim to minimise inconvenience by restoring services as quickly as we can. Reference Number WO: 06560334.
  • See all major faults

  • Scheduled works

  • Underway
  • Nelson St
  • South Plympton
  • 20/09/2018
  • Temporary Supply Interruption
  • Estimated start time and water supply off: 21/09/2018 09:00 AM
    Estimated restore time and water supply back on: 21/09/2018 03:00 PM

    We’re improving your services and undertaking maintenance work in South Plympton. Sometimes our crews need to temporarily interrupt the water supply to our customers and/or manage traffic while they are working. Temporary traffic management may remain in place until reinstatement of the impacted road is complete. We always aim to minimise inconvenience by restoring services as safely and quickly as we can.


  • See all scheduled works