Biofiltre Rotofix Wastewater Treatment Plant, Saint-Damien, Québec

Biofiltre Rotofix is a municipal wastewater treatment plant located on Rue Principale in Saint-Damien, a small community in the Matawinie region of Lanaudière, Québec, Canada. The plant serves a population of 134 and operates under secondary treatment standards, reflecting its role in managing local domestic wastewater. The plant provides secondary treatment, a standard level for small communities in Canada. Under the Canadian federal wastewater regulations, secondary treatment is required for all municipal systems to reduce organic matter and suspended solids. Consistent with its small service population. The treated effluent from Biofiltre Rotofix is discharged into the local watershed, which ultimately drains into the Saint Lawrence River via the Lanaudière river system. This region supports diverse aquatic life and is part of a larger ecosystem that includes the Saint Lawrence River, a major waterway flowing into the Gulf of Saint Lawrence and the Atlantic Ocean.

The plant discharges into a local watercourse that flows through the Lanaudière region and eventually reaches the Saint Lawrence River. The Saint Lawrence River is a critical freshwater resource and supports a wide range of fish species, including Atlantic salmon and lake sturgeon. Downstream, the river feeds into the Gulf of Saint Lawrence, a biologically productive marine environment. The plant's secondary treatment helps protect these downstream ecosystems from nutrient pollution and organic loading.