Overview
Yalis WWTP is a secondary treatment plant serving 1,085 people in Area D (Nimpkish Valley/Cormorant Island), British Columbia, Canada. It discharges 487 m³/day of treated wastewater near the coast.
Yalis WWTP is a municipal wastewater treatment facility located in Area D (Nimpkish Valley/Cormorant Island), within the Regional District of Mount Waddington, British Columbia, Canada. The plant serves a small population of 1,085 residents and operates under secondary treatment standards, reflecting its role in a rural coastal community. The plant employs secondary treatment, which is the minimum standard required under Canadian federal regulations for wastewater systems discharging into sensitive environments. With a daily discharge volume of 487 m³, the facility is designed to meet the Canadian Wastewater Systems Effluent Regulations (WSER), which mandate effluent quality standards for carbonaceous biochemical oxygen demand, suspended solids, and other parameters. The treated effluent is discharged into the coastal waters of the Pacific Ocean near northern Vancouver Island. This area supports diverse marine life, including salmon, herring, and other species, making proper treatment essential for protecting local ecosystems and maintaining water quality in the region.
Environmental context
The plant discharges into the coastal waters of the Pacific Ocean near the northeastern shore of Vancouver Island. The receiving environment includes the Broughton Archipelago, a complex of islands and channels that support rich marine biodiversity, including salmon runs, orcas, and seabirds. The area is ecologically sensitive due to its role as a migratory corridor and spawning ground for Pacific salmon, requiring careful management of wastewater discharges to minimize nutrient and pathogen impacts.
Frequently asked questions
Yalis WWTP is located on North Side Trail in Area D (Nimpkish Valley/Cormorant Island), within the Regional District of Mount Waddington, British Columbia, Canada.
The plant serves a population of 1,085 people in the surrounding rural and island communities.
The plant discharges treated effluent into the coastal waters of the Pacific Ocean near northern Vancouver Island, after secondary treatment.
The plant operates under Canada's Wastewater Systems Effluent Regulations (WSER), which set national standards for effluent quality, including limits on carbonaceous biochemical oxygen demand, suspended solids, and other pollutants.
For small communities in Canada, secondary treatment is common, often using lagoons or mechanical systems. The WSER requires secondary treatment or equivalent for most systems, with some flexibility for remote or small communities.
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