CARIGNAN Wastewater Treatment Plant, Carignan, Grand Est, France

The CARIGNAN wastewater treatment plant is located in Carignan, a commune in the Ardennes department of the Grand Est region, France. The plant serves a population of approximately 3,100 people, classifying it as a small agglomeration under French and EU regulations. Its designed capacity of 3,400 cubic meters per day indicates it is sized to handle the community's wastewater needs. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The plant discharges an average of 554.64 cubic meters of treated wastewater daily. The treated effluent is discharged into the local watershed, which ultimately drains into the Meuse River basin. The Meuse flows through France, Belgium, and the Netherlands before reaching the North Sea. The advanced treatment level helps protect the ecological health of the Meuse River and its downstream environments, including important habitats for aquatic life and migratory fish species.

The plant's treated effluent enters the local watercourse, which is part of the Meuse River basin. The Meuse River flows northward through the Ardennes region, supporting diverse aquatic ecosystems and providing water for agriculture and industry. Downstream, the river passes through Belgium and the Netherlands, eventually discharging into the North Sea. The advanced treatment at this plant helps reduce nutrient loading, which is critical for preventing eutrophication in the river and coastal waters. The Ardennes region is known for its forested landscapes and sensitive freshwater habitats, making effective wastewater treatment essential for preserving local biodiversity.