Sedley Lagoon Wastewater Treatment Plant, Sedley, Saskatchewan

Sedley Lagoon is a wastewater treatment facility located in Sedley, Saskatchewan, Canada, serving a small population of 307 residents. The plant is situated in the rural municipality of Francis No. 127 and provides secondary treatment for the community's domestic wastewater. The plant operates under the regulatory framework of Saskatchewan's Environmental Management and Protection Act, which governs wastewater discharges for small communities. The treated effluent from Sedley Lagoon is discharged into the local watershed, which ultimately drains into the Qu'Appelle River system and then into the Assiniboine River, a tributary of the Red River. This river network supports diverse aquatic life and is important for regional water quality.

Sedley Lagoon discharges into the Qu'Appelle River basin, which flows through southern Saskatchewan and into Manitoba. The Qu'Appelle River is part of the larger Red River drainage system, ultimately reaching Lake Winnipeg. This watershed supports important fish populations and migratory birds, making water quality management critical for downstream ecosystems.