SIVU Lapanouse Severac le Chateau - Advanced Wastewater Treatment in Sévérac d'Aveyron, France

SIVU Lapanouse Severac le Chateau is an advanced wastewater treatment plant located in Sévérac d'Aveyron, in the Occitanie region of southern France. The plant serves a population of approximately 4,727, making it a small to medium agglomeration under French and EU classification. The plant provides advanced treatment, which goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. This level of treatment typically includes nutrient removal to protect sensitive receiving waters. The plant has a designed capacity of 5,583 cubic meters per day and currently discharges an average volume of 843 cubic meters per day. The treated effluent is discharged into the local watershed, which ultimately drains into the Aveyron River, a tributary of the Tarn River, and then into the Garonne River before reaching the Atlantic Ocean. The plant plays a key role in protecting the water quality of these rivers and the downstream ecosystems, including the Garonne estuary.

The plant discharges into the Aveyron River basin, which flows into the Tarn and then the Garonne River, eventually reaching the Atlantic Ocean. The Garonne is a major river supporting diverse aquatic life and providing water for agriculture and human use. The advanced treatment helps reduce nutrient loads, protecting downstream water bodies from eutrophication and maintaining ecological balance in the watershed.