Stavely Lagoon Wastewater Treatment Plant, Municipal District of Willow Creek No. 26, Alberta

Stavely Lagoon is a wastewater treatment facility located in the Municipal District of Willow Creek No. 26, Alberta, Canada. The plant serves a small population of 423 residents and operates with secondary treatment, a standard level for communities of this size in the region. As a secondary treatment plant, Stavely Lagoon utilizes biological processes to reduce organic matter and suspended solids. The plant's design aligns with typical lagoon systems common in rural Alberta, which rely on natural biological degradation in aerated or facultative ponds. The treated effluent is released into the local watershed, which ultimately drains into the Oldman River basin, part of the larger Saskatchewan River system. This river network supports diverse aquatic life and agricultural activities downstream. The plant's operation is regulated under Alberta's Environmental Protection and Enhancement Act, ensuring compliance with provincial water quality standards.

The treated effluent from Stavely Lagoon enters local watercourses that flow into the Oldman River, a major tributary of the South Saskatchewan River. This watershed supports irrigated agriculture, livestock, and riparian ecosystems. Downstream, the South Saskatchewan River joins the Saskatchewan River system, which eventually reaches Lake Winnipeg. The plant's secondary treatment helps protect water quality in this agriculturally sensitive region.