Etangs Aerees Wastewater Treatment Plant, Saint-Urbain-Premier, Quebec

Etangs Aerees is a municipal wastewater treatment facility located on Rue Principale in Saint-Urbain-Premier, a small community in the Beauharnois-Salaberry region of Montérégie, Quebec. The plant serves a population of 517 and operates under Quebec's provincial environmental regulations, which align with Canada's federal wastewater standards. The plant provides secondary treatment, a process that removes biodegradable organic matter and suspended solids. With a daily discharge volume of 232.00 cubic meters, it is designed for a small agglomeration. Canadian regulations under the Wastewater Systems Effluent Regulations (WSER) require secondary treatment or equivalent for facilities of this scale to protect receiving waters. The treated effluent is released into a local watercourse that drains into the St. Lawrence River, a major aquatic ecosystem supporting diverse fish species and migratory birds. The plant's operation helps maintain water quality in the broader St. Lawrence watershed, which is ecologically significant for the region.

The plant discharges into a local tributary that flows into the St. Lawrence River, one of North America's largest and most ecologically important waterways. The St. Lawrence River supports a rich diversity of aquatic life, including fish species such as lake sturgeon and Atlantic salmon, and provides critical habitat for migratory waterfowl. The watershed is influenced by agricultural runoff and urban development, making the plant's secondary treatment essential for reducing nutrient and organic pollution.