DECIZE Caqueret Wastewater Treatment Plant, Decize, France

DECIZE Caqueret is an advanced wastewater treatment plant located in Decize, in the Bourgogne-Franche-Comté region of France. The plant serves a population of approximately 4,518 people and has a designed capacity of 9,667 m³/day, with a current discharge volume of 806 m³/day. As an advanced treatment facility, DECIZE Caqueret goes beyond secondary treatment to remove nutrients and other pollutants, ensuring high-quality effluent. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, and advanced treatment is often mandated in sensitive areas to protect water quality. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Loire River basin. The Loire is one of France's major rivers, supporting diverse aquatic ecosystems and providing water for agriculture and drinking water downstream. The advanced treatment helps protect these downstream environments from nutrient pollution and other contaminants.

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