CHATILLON LOIRE Wastewater Treatment Plant, Châtillon-sur-Loire, France

CHATILLON LOIRE is an advanced wastewater treatment plant located in Châtillon-sur-Loire, in the Centre-Val de Loire region of France. The plant serves a population of around 2,126 people and has a designed capacity of 3,500 m³ per day, with an average discharge volume of 379.27 m³ per day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, meeting the stringent requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC). For small agglomerations like this, the directive mandates appropriate treatment to protect receiving water bodies. The plant discharges treated effluent into the local watershed, which ultimately drains into the Loire River, one of France's major rivers. The Loire River supports diverse aquatic life and is an important ecological corridor. The advanced treatment helps minimize nutrient loading and protect downstream water quality.

The plant discharges into the Loire River basin, which flows through central France before reaching the Atlantic Ocean. The Loire River is known for its rich biodiversity, including migratory fish species such as Atlantic salmon and European eel. Advanced treatment at this plant helps reduce nutrient pollution, safeguarding the river's ecological health and supporting its role as a vital freshwater resource.