Montberon Wastewater Treatment Plant, Occitanie, France

The Montberon wastewater treatment plant is located in the commune of Montberon, within the Occitanie region of southern France. It serves a population of approximately 3,322 residents, 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 sensitive areas. With a designed capacity of 4,000 m³/day and an average daily discharge of 592.64 m³/day, the facility operates well below its maximum capacity, indicating room for future growth. The treated effluent is discharged into local waterways that ultimately drain into the Garonne River basin, which flows into the Gironde estuary and the Atlantic Ocean. The plant's advanced treatment helps protect the ecological health of the Garonne watershed, which supports diverse aquatic life and is important for regional biodiversity.

The plant discharges into the Garonne River basin, which flows through southwestern France to the Gironde estuary and the Atlantic Ocean. The Garonne watershed is ecologically significant, supporting migratory fish species such as Atlantic salmon and European eel. Advanced treatment at Montberon reduces nutrient loads, helping to prevent eutrophication in downstream waters.