St-Augustine Wastewater Treatment Plant, Sainte-Julie, Quebec

The St-Augustine wastewater treatment plant is located in Sainte-Julie, Quebec, Canada, serving a small community of 334 residents. As an operational facility with secondary treatment, it manages a discharge volume of 150 cubic meters per day, reflecting its scale as a small agglomeration. Secondary treatment is the standard biological process that removes organic matter and suspended solids. In Quebec, such facilities are regulated under the provincial Environment Quality Act and the federal Fisheries Act, which set effluent quality standards to protect receiving waters. For plants of this size, secondary treatment is typically sufficient to meet regulatory requirements. The plant discharges treated effluent into a local watercourse that ultimately drains into the St. Lawrence River, a major waterway flowing into the Gulf of St. Lawrence and the Atlantic Ocean. The St. Lawrence River supports diverse aquatic life and is an important ecological corridor in the region.

The plant's treated effluent enters a local tributary that flows into the St. Lawrence River, which drains into the Gulf of St. Lawrence and the Atlantic Ocean. The St. Lawrence River is a vital freshwater ecosystem supporting fish species such as Atlantic sturgeon and American eel, and its estuary provides critical habitat for migratory birds. The plant's secondary treatment helps reduce nutrient and organic loading to this sensitive watershed.