Carramar Wastewater Pump Station Upgrade

NSW
Sydney Water
In progress

Carramar is a key wastewater pumping station within the Georges River network, transferring flows to the Northern Georges River sub-main. As part of Sydney Water’s broader odour and corrosion management strategy for the Malabar wastewater system, this site was prioritised for an upgrade. As part of the West Region Delivery Team (WRDT), we delivered the upgrade, focusing on reducing odour emissions and hydrogen sulphide concentrations from the pumpstation and its adjoining pipelines to improve network performance and customer experience.

Scope of Works

The project involved the design, construction and installation of a new Odour Control Unit (OCU) at the wastewater pump station. Key elements included:

  • Ventilating the pumping station to capture foul air.
  • Treating extracted air through a new OCU system.
  • Reducing hydrogen sulphide levels within the pipelines to protect network assets and mitigate corrosion.
  • Meeting the performance requirements.

Working in a dense urban environment

The wastewater pump station is located within a built-up area and required careful planning to deliver the Odour Control Unit. Considerations included access, construction footprint, traffic management, and maintaining safe separation from surrounding properties and utilities.

The presence of multiple underground utilities around the site meant that any excavation work was carried out with precision, additional investigation, and strict safety controls to avoid service disruptions or damage.

Maintaining continuous operation of a critical asset

As a major contributor to the Northern Georges River sub‑main, the wastewater pump station needed to remain fully operational whilst construction was underway. Designing tie-ins, ventilation modifications, and installation of the new odour control unit required staged construction, temporary arrangements and strict operational controls.

Improved air quality for locals

The project was delivered successfully, ahead of schedule and under budget and now plays an important role in improving air quality around the pumping station for the local community. The upgraded odour control system has improved network resilience, reduced air quality and supports Sydney Water’s long-term corrosion and odour management goals for the Malabar catchment.