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

  • Multiple streets
  • Goolwa
  • 19/10/2017
  • Water Quality
  • SA Water customers in Goolwa and surrounding areas, including Goolwa Beach, Goolwa South, Goolwa North and Hindmarsh Island may currently be experiencing discoloured or milky water coming out of their taps.

    This water remains safe to drink.

    During recent planned maintenance in the area, some existing sediment in the local water supply network has been stirred up, resulting in the discoloured water.

    We are working hard to resolve the issue, and we are flushing out the discoloured water. Given the size of the water network in the area, this may take some time. At this stage, we are hoping water supply will return to normal by Friday afternoon.

    We will continue to monitor the situation, and provide updates on our website and Facebook page.

    For further information or any questions, please contact us on 1300 SA WATER.

  • See all major faults

  • Scheduled works

  • Underway
  • Thomas St
  • Croydon
  • 23/10/2017
  • Supply Interruption
  • Estimated start time (water off): 23/10/2017 09:00 AM
    Estimated restore time (water back on): 23/10/2017 03:00 PM

    We’re committed to improving your services and are undertaking maintenance work in Croydon. Water supply in the surrounding area may be impacted during the above times. Traffic restrictions may also apply.


  • See all scheduled works