bassin Wastewater Treatment Plant, Saint-Louis-de-Gonzague, Quebec

The bassin wastewater treatment plant is located in Saint-Louis-de-Gonzague, Quebec, Canada, within the Beauharnois-Salaberry regional park. It serves a small population of 668 people, reflecting its role in a rural community. The plant is operational and provides secondary treatment, which is typical for small agglomerations in Canada. Under Canadian wastewater regulations, secondary treatment is the standard for municipal plants, ensuring removal of biodegradable organic matter and suspended solids. The plant operates within the framework of Quebec's environmental regulations. The treated effluent is discharged into the local watershed, which ultimately drains into the St. Lawrence River via the Châteauguay River system. This river system supports diverse aquatic life and is an important migratory corridor for fish. The plant's secondary treatment helps protect downstream water quality in this ecologically sensitive region.

The plant discharges into the Châteauguay River watershed, which flows into the St. Lawrence River, a major waterway that empties into the Gulf of St. Lawrence. The St. Lawrence River supports diverse aquatic ecosystems, including fish species such as Atlantic salmon and sturgeon. The plant's secondary treatment reduces organic pollution, helping to maintain water quality in this ecologically important river system.