1274. Hon ROBIN SCOTT to the minister representing the
Minister for Water:
I refer the minister to the Perth
seawater desalination plant located in Kwinana.
(1) How much
water is sucked out of Cockburn Sound by the Kwinana desalination plant each
(2) How much
drinking water is produced each day from that total amount of seawater
extracted from Cockburn Sound?
(3) How much
wastewater is returned into Cockburn Sound each day?
(4) What is the
total cost per kilolitre of water produced from the Kwinana desalination plant?
ALANNAH MacTIERNAN replied:
I thank the member for the question.
(1) Each day, up to 349 million
litres of seawater is extracted from Cockburn Sound.
(2) Each day, up to 149 million
litres of drinking water can be produced.
(3) Each day, approximately 200
million litres of brine is returned to Cockburn Sound.
(4) The operating cost in 2019–20 is estimated
to be 68� a kilolitre. The total unit cost, taking into
consideration construction costs and conveyance infrastructure, results
in a total cost of desalinated water of between $2 and $3 a kilolitre.