Magrath Lagoon Wastewater Treatment Plant, Cardston County, Alberta

Magrath Lagoon is a wastewater treatment facility located in Cardston County, Alberta, Canada. It serves a small rural community with a population of 293, providing secondary treatment to meet provincial environmental standards. The plant is part of Alberta's municipal wastewater infrastructure, which operates under the province's Environmental Protection and Enhancement Act and the Wastewater and Storm Drainage Regulation. The plant uses a lagoon-based secondary treatment process, which is common for small communities in the region. The treated effluent volume is reported at 836.90 megaliters per year. The plant's design is appropriate for the population served, and it operates under Alberta's regulatory framework that requires effluent quality standards for discharge into the environment. The treated wastewater from Magrath Lagoon is discharged into local watercourses that eventually drain into the Oldman River, a tributary of the South Saskatchewan River system. This river system supports diverse aquatic life and is used for irrigation, recreation, and municipal water supply downstream. The plant's operation helps protect the water quality of these important waterways.

Magrath Lagoon discharges into local streams that flow into the Oldman River, which is part of the South Saskatchewan River Basin. This basin ultimately drains into Hudson Bay via the Saskatchewan River system. The region is semi-arid, and the river supports agricultural irrigation and sensitive aquatic ecosystems, including fish species such as walleye and northern pike. Proper wastewater treatment is essential to maintain water quality in this ecologically important watershed.