Northwest Langley (Langley)

The Northwest Langley wastewater treatment plant treated about 4.5 billion litres of wastewater in 2012. Located in Langley at 10301 - 201 Street, the plant provides secondary treatment to wastewater from about 27,000 residents in the Walnut Grove area of Langley. Once treated, wastewater is discharged into the Fraser River.



Northwest Langley WWTP TourNorthwest Langley WWTP Tour218556882

Plant Upgrades

Over the next several years, Metro Vancouver will be upgrading the Northwest Langley Wastewater Treatment Plant to improve effluent quality, provide enhanced environmental protection for the Fraser River and accommodate projected population growth.

Treatment standards

The wastewater treatment plant is regulated through an Operational Certificate issued by the BC Ministry of Environment. The treated wastewater that is discharged from the plant is required to meet standards for biochemical oxygen demand and total suspended solids. Discharged wastewater from the plant must not exceed 45 mg/L for both biochemical oxygen demand and total suspended solids. The plant’s daily average was 12 mg/L for biochemical oxygen demand and 21 mg/L for total suspended solids in 2012.

Recovering resources from wastewater

Solids removed from the treatment process at the Northwest Langley plant are trucked to the Annacis Island wastewater treatment plant for processing with the biosolids from that plant.