Wetland system to support wastewater treatment

Westernport Water is planning a significant infrastructure project at the King Road Wastewater Treatment Plant to ensure reliable and sustainable sewerage services for the Bass Coast for years to come.

The $6.46 million project is jointly funded by the Australian and Victorian governments.

Located on the traditional lands of the Bunurong People in Corinella, the 168-hectare treatment plant site also operates as a working farm and provides important habitat for native wildlife such as kangaroos and migratory birds.

“The King Road Recycled Water Wetland Storage project will increase recycled water availability, provide additional storage capacity, enhance wetland habitat, and contribute to emissions reduction through increased carbon absorption,” said Managing Director Westernport Water, Dona Tantirimudalige.

Wastewater is treated to a Class C recycled water standard and reused on site to irrigate pasture, as well as eucalyptus plantations harvested by Phillip Island Nature Parks to feed koalas in their care.

The plant currently provides sewerage service to around 3000 customers in waterline communities. The service area is projected to reach up to 8000 customers by 2040.

To support future growth, Westernport Water is planning for a new integrated treated wastewater wetland system.

The constructed wetlands will refine the treated effluent to a higher quality by filtering through a series of progressively shallower wetlands, providing an opportunity for plants to take up nutrients.

Subject to planning approvals, construction is expected to commence in late 2026.
With guidance from Bunurong Land Council Aboriginal Corporation, Westernport Water is identifying opportunities to protect and respect Bunurong cultural values across the landscape.

Future opportunities for limited public access for recreational and educational purposes are also being explored, recognising the positive benefits of connection to nature for community health and wellbeing.

Public access would be carefully managed, with wastewater treatment remaining the plant’s primary function. All activities will be subject to strict safety, operational and environmental requirements.