A giant desalination plant in Perth’s northern suburbs is in the mix to be the city’s next major drinking water source, with the Water Corporation set to undertake preparatory works.

The State-owned utility has revealed it is about to carry out a seismic survey of the seabed off Alkimos to identify potential issues or risks associated with building a desalination plant there.

Testing will begin on September 17 and last for three weeks, before a drilling barge is used for “core sampling” until November.

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