Greater Nanaimo Pollution Control CentreWastewater from approximately 93,000 people in the City of Nanaimo, Snuneymuxw First Nation, and parts of Lantzville is treated at the Greater Nanaimo Pollution Control Centre (GNPCC). Wastewater is gravity fed and pumped to GNPCC via three pump stations - Wellington Pump Station, Departure Bay Pump Station and Chase River Pump Station. The Chase River Pump station also has a septage receiving site that accepts septage from residential onsite (septic) systems and wastewater from pump-and-haul clients.
The GNPCC uses chemically-enhanced primary treatment to remove 30-40% of BOD and 50% of TSS. It also uses a cogeneration system that converts waste gas from the digesters to electricity that can be used to power the plant. To learn more, please visit our Treatment Processes page. Upgrades are underway to provide secondary treatment to improve effluent quality. Secondary treatment is able to remove up to 90% of BOD and 50% of TSS.
Effluent is discharged into the Strait of Georgia 2,030 m offshore at a depth of 70 m.
Major Projects & Improvements
|2017-2019||Secondary Treatment Upgrade Project|
|2014-2016||Upgrading and replacing the outfall|
|2013||Construction of Sedimentation Tank 4, to improve plant efficiencies and support increasing flows|
|2011-2013||Construction of a third digester to improve plant efficiencies and support increasing flows|
|2009-2012||Construction and commissioning of a Cogeneration system|
|2008-2012||Phase II Odour Control installed|
|2007-2009||Gravity Thickeners constructed to improve solids handling|
|2005-2007||Phase I Odour Control installed|
|2002||Introduction of Chemically Enhanced Primary Treatment|
|1988-1990||Stage II expansion to improve plant efficiencies and support increasing flows|
|1972||The RDN took over operational responsibility of GNPCC|
|1971-1974||Construction of GNPCC with Primary Treatment, ending the discharge of raw sewage to the Strait of Georgia.|