AUD144 Million Upgrade of Charmhaven Sewage Treatment Plant (STP) Officially Commences

 Works are officially now underway on major plant upgrades following the ‘turning of the sod’ ceremony at the Charmhaven STP.

The project, being delivered by BMD, will increase the plant’s capacity to service 75,000 equivalent persons (EP), with provisions to support future growth to 150,000 equivalent persons. The upgrade will ensure the facility continues to meet current and future environmental and community needs.

Council Mayor Lawrie McKinna said the project represents a significant investment in essential infrastructure for the region.

“This morning marked a significant milestone in a landmark project for the Central Coast and the largest contract Council has awarded,” Mayor McKinna said. “The Charmhaven STP upgrade will help ensure reliable wastewater services for our growing community, while protecting the health of our waterways now and into the future.”

Council Director Water and Sewer, Jamie Loader said the upgrade would strengthen the performance and resilience of the treatment plant.

This major upgrade will address operational, environmental and regulatory requirements, while providing capacity for future growth. Importantly, the existing plant will continue to operate safely while construction progresses, with completion of works anticipated for mid-2028.

Jamie Loader, Council Director Water and Sewer

BMD Constructions Southern Region General Manager, Antony Damiani said the company is well equipped to deliver the contract with certainty and expertise.

“With works commencing on site this month, BMD brings extensive experience in water infrastructure, from delivering clean water to local communities to managing multi-million-dollar upgrades across metropolitan and regional systems,” Damiani said. “By embedding Central Coast local knowledge and skills, we’ll ensure the project is delivered successfully and benefits the region.”

The project is funded through Council’s long-term financial plan and supported by future revenue under the Independent Pricing and Regulatory Tribunal (IPART) pricing determination.

To learn more, head to the Charmhaven STP upgrade project page.