Westside Regional Wastewater Treatment Plant

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The Regional District of Central Okanagan operates a Biological Nutrient Removal (BNR) Wastewater Treatment Plant (WWTP).  

The Westside Regional Wastewater Treatment plant is located on Gellatly Road and receives wastewater from the City of West Kelowna, the District of Peachland and Westbank First Nation Reserves #9 and #10.  View Annual Reports

The original plant began service in 1989 and was designed for a population of 7,000 and a nominal hydraulic capacity of 2,800 cubic meters of wastewater per day.   The original plant is no longer in service and three major upgrades have taken place, the most recent completed in 2012.  The plant now provides wastewater treatment for approximately 42,000 people with a nominal hydraulic capacity of 16,800 cubic meters per day.  2012 Expansion Plan Information  Detailed Plant Process Information

Wastewater enters the plant through a Parshall Flume (to provide control and monitoring of flow) and is then screened and degritted prior to receiving primary clarification. The plant operates a secondary treatment process called the 'Westbank Process', an internationally recognized process of treating wastewater. The Westbank Process is based on the 3-Stage Bardenpho process with provisions for a Return Activated Sludge denitrification upstream of the anaerobic zone. Each bioreactor feeds a dedicated secondary clarifier. The effluent undergoes tertiary treatment via filtration and Ultra Violet disinfection. The tertiary treated effluent from the plant is discharged into Okanagan Lake through an outfall.

The primary solids stream at the treatment plant undergoes fermentation, while the waste secondary solids stream is treated with a DAF thickener. Both streams are pumped to a centrifuge for dewatering with the dewatered sludge trucked off site for disposal.


If you would like to receive email notifications of any issues/planned work at the Westside Regional Wastewater Treatment Plant, please email us and we will add you to our distribution list.

User Fees

User fees are required to pay for operation and maintenance costs and to set aside funds for future equipment repairs and replacements.  For detailed sewer system fees view an electronic version of Westside Sewer Systems Bylaw No. 1315, 2012 (replaces Consolidated Bylaw No. 1171) which is provided for convenience only.  For more information, email us at engineer@rdco.com  or call 250-469-6241.

Development Cost Charges

Biosolids Information, Technical Briefing Audio and Presentations 

Regional District of Central Okanagan | 1450 KLO Road | Kelowna, BC V1W 3Z4
Ph: 250-763-4918 | Fax: 250-763-0606 | Email: info@rdco.com
Hours: Monday – Friday 8:00 am – 4:00 pm (Closed Holidays)