etang Herouxville Wastewater Treatment Plant, Hérouxville, Québec

The etang Herouxville wastewater treatment plant is located at 119 Rue Jean-Pierre in Hérouxville, a small community within the Mékinac Regional County Municipality in the Mauricie region of Québec, Canada. The plant serves a population of approximately 1,298 residents, reflecting its role as a small-scale municipal facility. The plant operates at a secondary treatment level, which is the standard requirement under Canadian federal and provincial regulations for communities of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring the effluent meets environmental quality standards before discharge. The treated wastewater is discharged into a local water body, contributing to the protection of the broader Saint-Maurice River watershed. This river flows southward into the St. Lawrence River, one of Canada's most significant waterways, supporting diverse aquatic ecosystems and serving as a vital resource for communities downstream.

The plant discharges into a tributary of the Saint-Maurice River, which flows into the St. Lawrence River near Trois-Rivières. The St. Lawrence River is a major ecological corridor supporting fish species such as Atlantic sturgeon and American eel, as well as migratory birds. The secondary treatment process helps reduce nutrient loading and organic pollution, protecting the aquatic health of these downstream waters.