PFAS in wastewater and biosolids – Risk management and treatment strategies
PFAS (Per- and polyfluoroalkyl substances) present a growing challenge in the wastewater sector, especially in biosolids management.
GHD supported Watercare Services to reduce wastewater overflows into Auckland’s Waitemata Harbour with the design of a large wastewater storage and pump station facility and associated pipelines. Catering for the expected population growth for Auckland’s North Shore, the new facility was also needed to meet wastewater overflow level of service requirements during wet weather.
A new 500 l/s capacity wastewater pumping station, a 3500 m3 volume underground emergency storage and approximately 1600 m of pipelines were key elements of the new facility located at Barry’s Point adjacent to the Shoal Bay shoreline. Particular engineering challenges included the location of the 10m deep facility in a closed landfill and within a 1 in 100 year flood zone.
The completion of the $30M facility has resulted in a significant reduction of wastewater overflows into Auckland’s harbour, improving the overall operational resilience of the wastewater network.
PFAS (Per- and polyfluoroalkyl substances) present a growing challenge in the wastewater sector, especially in biosolids management.
GHD professionals share their perspectives on water and climate risks in Influents (Spring 2025 edition), the official publication of the Water Environment Association of Ontario.
Our bid for the On-Call Consultants List for Planning and Technical Support for LA Sanitation and Environment (LASAN) has been selected. This highlights our dedication to LASAN's goals of reducing environmental impacts, adapting to climate change, supporting economic development, and promoting environmental justice.