Western Treatment Plant

Located in Werribee, the 10,500 hectare Western Treatment Plant is a world leader in technical and environmental innovation. It processes around half of Melbourne's sewage and produces almost 40 billion litres of recycled water a year.​

Sewage treatment process

Learn how we treat raw sewage at the plant's lagoons to produce high quality recycled water.

Habitats and wildlife

The plant is a haven for tens of thousands of birds and encompasses a diverse and complex array of habitats, vegetation and wildlife. 

Community and environmental benefits

We're continually improving our plant operations to benefit the environment and local community.


Sheep and cattle have been grazing on the plant's lush pastures for over a century – we've established a partnership to take the farm into a new era.


More information on the Biodiversity Conservation Advisory committee.

Did you know?

The area around the plant is a haven for tens of thousands of birds, and is listed as a wetland of international significance under the Ramsar Convention.

Ramsar Convention

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