The proposed option for the Subiaco Water Resource Recovery Facility upgrade, includes:
- a new compact treatment plant with a capacity of 90 ML per day
- advanced primary and secondary treatment processes
- a new odour control facility, including biotrickling filters and activated carbon filters, with ducting from each process area
- energy recovery, and
- provision for future expansion to 120 ML per day.
Key Dates
| Nov 2026 | EOIs Open |
Funding contributions
| WA Government | |
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The WA Government committed an initial $105 million for detailed design, engineering and site preparation works
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Procurement
| Procuring Agency: | Water Corporation |
| Procurement note: | The project is expected to be delivered under an ECI model transitioning to a Design and Construct contract. |
PROJECT HISTORY
| Jun 2026 | IWA published an assessment of the project. It found the preferred option had a benefit-cost ratio of 1.2, with nearly half of the monetised benefits coming from deferring more than $1.1 billion in upgrades to the Woodman Point WRRF and the Sepia Depression Ocean Outlet Landline. |
| Nov 2026 | The Water Corporation opened an EOI process for the project. |
Estimated Total Cost
(2026)
Sector
Water & Sewerage
Procurement approach
Design and Construct (D&C) |
Location
Western Australia |
Resources
