Blue Lake Reservoir

Blue Lake Reservoir

The Blue Lake at Mount Gambier in the state's south east is a volcanic crater that contains groundwater from local aquifer systems. The water seeps into the crater through porous limestone.

The total capacity of water in the lake has been calculated at 36,000 ML, making it the third largest water storage in South Australia. About 10% of the capacity is used each year by the regional City of Mount Gambier. Groundwater recharges the lake.

Water from the lake has been used for reticulated supply since the early 1880s.

The eruption that formed the volcanic crater is believed to have occurred nearly 5000 years ago.

Capacity: 36,000 megalitres.

If this reservoir supplied the whole state, how long would this last? About 61 days.

Area of water spread: 70 hectares.

Open to the public? Yes. Access to SA Water land via organised tours. Access to adjoining Council land (walking trail and other interpretative facilities).

When can I visit? Managed on request. Council facilities available 24 hours a day, 7 days a week.

How full is this reservoir? We currently don't monitor this reservoir's volume.

  • Major faults

  • Reported

  • Barons St
  • Magill
  • 15/05/2019
  • Water Mains Leak
  • Last Updated: 15/05/2019 04:20 AM - We have a report of an incident in Magill and the water supply nearby may be impacted. Traffic management may be in place. Reference Number WO: 06932850.
  • See all major faults

  • Scheduled works

  • Underway
  • Delhi Av
  • Hillcrest
  • 22/05/2019
  • Temporary Supply Interruption
  • Estimated start time and water supply off: 23/05/2019 09:00 AM
    Estimated restore time and water supply back on: 23/05/2019 06:00 PM

    We’re improving your services and undertaking maintenance work in Hillcrest. 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

Follow Us On