In 1910 the first wastewater treatment works south of Perth were built in South Fremantle.
It served the immediate Fremantle area with three large septic tanks that discharged into the ocean from Robbs Jetty.
Fremantle grew fast after World War II and by 1962 a wastewater treatment upgrade was planned.
A new plant at Woodman Point opened in 1966. Another move, further south to the present location, came in 1984. Advanced secondary treatment facilities were completed in 2002.
In May 2002, it was announced that the largest wastewater recycling plant of its type in Australia is to be built at Kwinana. The plant was to be initially capable of processing five gigalitres (five million kilolitres) of treated wastewater each year to a quality suitable for use by major Kwinana industrial customers.
The trigger for the $20 million project was the decision by Rio Tinto to establish its HIsmelt pig iron plant at Kwinana. BP, Edison Mission, CSBP and TiWest also indicated their support.
The plant was built and commissioned in late 2004, and is owned and operated by the Water Corporation.
A major upgrade of the Sludge Treatment stage and Odour Control facilities was competed in 2011 and provided a modern plant with a high standard of odour management.
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