AUSSILLON Ville Wastewater Treatment Plant, Aussillon, Occitanie, France

AUSSILLON Ville is a wastewater treatment plant located in Aussillon, a commune in the Tarn department of Occitanie, southern France. The plant serves a population of around 4,085 and has a designed capacity of 9,100 cubic meters per day, with an average discharge volume of 728.76 m³/day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. As a French facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for agglomerations of this size. Advanced treatment is typically mandated for discharges into sensitive areas. The treated effluent is discharged into the local watershed, which ultimately drains into the Thoré River, a tributary of the Agout, then the Tarn, and finally 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.

The plant discharges into the Thoré River, which flows into the Agout, then the Tarn, and eventually the Garonne River, which empties into the Atlantic Ocean. The watershed supports diverse aquatic life and is important for regional biodiversity. The advanced treatment helps protect sensitive downstream environments from nutrient pollution.