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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  • Scheduled works

  • Underway
  • Bishop & Tait St
  • Renown Park
  • 18/12/2017
  • Upgrade
  • Estimated start time (water off): 18/12/2017 9:00 AM
    Estimated restore time (water back on): 18/12/2017 3:00 PM

    As part of the required water main upgrade program and the ongoing Torrens Road to River Torrens project, SA Water will be undertaking a water main link-in along Bishop and Tait St, Renown Park on Monday 18 December 9:00am to 3:00pm. Traffic restrictions may also apply.

  • See all scheduled works