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

  • 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