Alexander Lagoon Wastewater Treatment Plant, Alexander, Manitoba

Alexander Lagoon is a wastewater treatment facility located along the Trans-Canada Highway in Alexander, within the Rural Municipality of Whitehead, Manitoba, Canada. The plant serves a small community of 89 residents and operates under secondary treatment processes, which provide biological treatment to reduce organic matter and suspended solids. As a secondary treatment plant serving fewer than 100 people, Alexander Lagoon falls under Canada's small community wastewater regulations. Canadian wastewater facilities are regulated under the federal Wastewater Systems Effluent Regulations (WSER) and provincial guidelines, which set effluent quality standards based on treatment level and receiving environment. The treated effluent from Alexander Lagoon is discharged into the local watershed, which drains into the Assiniboine River system. The Assiniboine River flows southeast to join the Red River near Winnipeg, eventually reaching Lake Winnipeg. This watershed supports diverse aquatic life and is important for regional water quality, especially given Lake Winnipeg's vulnerability to nutrient loading.

The plant discharges into the Assiniboine River watershed, which flows through Manitoba and joins the Red River before emptying into Lake Winnipeg. Lake Winnipeg is a large, shallow lake that experiences eutrophication from nutrient inputs, making the management of wastewater discharges critical. The local area is characterized by prairie landscape and agricultural activity, which can contribute to runoff. The secondary treatment at Alexander Lagoon helps reduce organic pollutants and nutrients, supporting downstream water quality.