Alkimos seawater desalination plant investigations

As part of our long term planning to secure Perth’s water supply, we have completed feasibility investigations and have commenced environmental approvals for a seawater desalination plant at Alkimos. The Alkimos Seawater Desalination Plant is one of a number of water source options being considered, with a decision on when a new source may be needed for Perth dependent on a range of factors, including population growth, climate and demand.
What we investigated?
- A seawater desalination plant with capacity to treat 25 billion litres of seawater per year, with a possible future expansion
- Two new ocean pipelines, below the seabed, that bring seawater into and take brine (salty water) away from the plant
- A water transfer pipeline to take water from Alkimos to Wanneroo, where the water will be connected to Perth’s water supply
- Understanding environmental impacts
- Working with the community to understand its needs.
We are also investigating a co-located groundwater treatment plant to be incorporated within the Alkimos Water Precinct.
You can read more about the investigations here.
Working with the community
We invited members of the Alkimos and surrounds community to be a part of our investigations. You can read more about our conversations with community here .
We also met with dozens of stakeholders, with feedback received reflected in our investigations.
We will continue to keep the community and stakeholders updated as we progress our planning.
Protecting the marine environment
Extensive research has been conducted to ensure the offshore pipelines required to bring seawater in and take brine away from the plant are located and constructed with the least possible environmental impact.
You can read more about how we are planning to protect the marine environment here.
Impacts on the local community
A priority of our investigations is minimising disturbance to surround homes and businesses during plant construction and operations. You can read more about how we have designed the plant to reduce noise and screened it from homes here.
Pipeline to Wanneroo Reservoir
Water from the plant will join Perth’s water supply through a 35km pipeline. You can read more about the pipeline here.
Have your say and register to stay updated
You can have provide feedback on the proposed plant or register to keep updated by emailing community.engagement@watercorporation.com.au
By registering your details, you can stay informed and continue to input feedback as we progress in the approval process.