Brissac Wastewater Treatment Plant, Brissac-Loire-Aubance, France

The Brissac wastewater treatment plant is located in Brissac-Loire-Aubance, within the Pays de la Loire region of France. It serves a population of approximately 2,220 residents, providing advanced treatment to protect local water quality. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants. The plant has a designed capacity of 3,500 m³/day and currently discharges an average of 396.04 m³/day, indicating ample reserve capacity. It operates under France's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for agglomerations of this size. The treated effluent is discharged into the local watershed, which ultimately drains into the Loire River. The Loire is France's longest river and flows into the Atlantic Ocean, supporting diverse aquatic ecosystems and important migratory fish species. The plant's advanced treatment helps reduce nutrient loading and protect downstream water quality.

The plant discharges into the Loire River basin, which flows westward through the Pays de la Loire region to the Atlantic Ocean. The Loire is a major European river known for its biodiversity, including migratory fish such as Atlantic salmon and European eel. Advanced treatment at this plant helps minimize nutrient pollution, supporting the ecological health of the river and its estuary.