Carbonne Wastewater Treatment Plant, Carbonne, Occitanie, France

The Carbonne wastewater treatment plant is located in Carbonne, a commune in the Haute-Garonne department of Occitanie, southern France. It serves a population of approximately 3,293 people, classifying it as a small agglomeration under French and EU regulations. 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. With a designed capacity of 4,000 m³/day and an average discharge volume of 587.47 m³/day, the facility operates well within its capacity, ensuring effective treatment of municipal wastewater. The treated effluent is discharged into the local watershed, which ultimately drains into the Garonne River via tributaries. The Garonne flows through southwestern France and into the Gironde estuary on the Atlantic coast. The advanced treatment helps protect the ecological quality of the Garonne basin, which supports diverse aquatic life and is important for regional water resources.

The plant discharges into the Garonne River basin, a major watercourse in southwestern France that flows into the Gironde estuary and the Atlantic Ocean. The Garonne supports diverse aquatic ecosystems, including migratory fish species such as Atlantic salmon and European eel. Advanced treatment at this plant helps reduce nutrient and pollutant loads, contributing to the ecological health of the river and its downstream environments.