North Lagoon Wastewater Treatment Plant, Area I (Sentinel Mountain), British Columbia

North Lagoon is an operational wastewater treatment plant located in Area I (Sentinel Mountain), within the Regional District of Central Kootenay, British Columbia, Canada. The plant serves a population of approximately 4,566 residents, placing it in the small-to-medium agglomeration category for Canadian wastewater infrastructure. As a lagoon-based system, North Lagoon provides natural treatment through settling and biological processes, which is common for smaller communities in British Columbia. The plant's designed capacity is 1.00 million liters per day, and it operates under provincial regulations administered by the British Columbia Ministry of Environment and Climate Change Strategy, which sets effluent quality standards for such facilities. The treated effluent from North Lagoon is discharged into the local watershed, which ultimately drains into the Columbia River basin. This river system supports diverse aquatic life and is an important ecological corridor in the Pacific Northwest. The plant's operation helps protect downstream water quality in this sensitive region.

North Lagoon discharges into the Columbia River basin, which flows south into the United States and eventually reaches the Pacific Ocean. The watershed supports salmonid species and other native fish, making water quality management critical for regional biodiversity. The plant's location in the mountainous terrain of British Columbia means it operates in a region with seasonal flow variations and sensitive aquatic habitats.