Penneshaw Desalination Plant

Penneshaw Desalination Plant

Due to a lack of an alternative viable water supply, a small seawater desalination plant was constructed at Penneshaw on Kangaroo Island in 1999. 

Seawater is drawn into the plant through an intake pipe and pre-screened. UV disinfection is used to minimise biological growth and filters remove most of the particulate matter. The filtered seawater is forced under high pressure through reverse osmosis membranes that allow fresh water to pass through, with very little salt. The desalinated water is re-mineralised with carbon dioxide (CO2) and marble chips to reduce its corrosive properties and improve taste prior to chlorine disinfection and distribution to customers.  

The plant is capable of producing 300kL of drinking water per day.


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  • Major faults

  • Reported

  • Black Rd
  • Flagstaff Hill
  • 22/08/2017
  • Major Leak
  • Last Updated: 22/08/2017 08:23 AM - We have received a report of an incident in Flagstaff Hill. Water supply in the surrounding area may be impacted as we resolve this issue. Traffic restrictions may also apply. Reference Number WO: 05973449.

  • See all major faults

  • Scheduled works

  • Underway
  • Rheims St
  • Broadview
  • 22/08/2017
  • Supply Interruption
  • Estimated start time (water off): 22/08/2017 09:00 AM
    Estimated restore time (water back on): 22/08/2017 03:00 PM

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


  • See all scheduled works