Overview
AUZEVILLE TOLOSANE is an advanced wastewater treatment plant in Auzeville-Tolosane, Occitanie, France, serving about 5,000 people with a design capacity of 7,000 m³/day.
AUZEVILLE TOLOSANE is an advanced wastewater treatment plant located in Auzeville-Tolosane, a commune in the Haute-Garonne department of Occitanie, southern France. The plant serves a population of approximately 5,000 and has a design capacity of 7,000 m³/day, with an average discharge volume of 896 m³/day. It is situated inland, more than 50 km from the coast, and treats wastewater for the local community. The plant employs advanced treatment processes, which go beyond the secondary treatment 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. As a French facility, it operates under national regulations transposing the EU directive, with permits issued by the local water agency (Agence de l'Eau). The treated effluent is discharged into the local watershed, which ultimately drains into the Garonne River via the Hers-Mort or a tributary. The Garonne flows through Toulouse and into the Gironde estuary on the Atlantic coast. The plant's advanced treatment helps protect the ecological quality of these water bodies, supporting aquatic life and downstream uses such as drinking water and recreation.
Environmental context
The plant discharges into the local river system, part of the Garonne basin, which flows through Toulouse and into the Gironde estuary on the Atlantic coast. The Garonne supports diverse aquatic life, including migratory fish species such as salmon and eels. Advanced treatment at this plant reduces nutrient loads, helping to prevent eutrophication in downstream waters and maintain the ecological balance of the estuary.
Frequently asked questions
The plant is located at the Complexe Agricole d'Auzeville-Tolosane, Mail du Pastel, in Auzeville-Tolosane, Haute-Garonne, Occitanie, France.
The treated effluent is discharged into the local river system, which is part of the Garonne basin. The Garonne River flows through Toulouse and into the Gironde estuary on the Atlantic coast.
The plant helps protect the water quality of the local tributaries and the Garonne River, which supports diverse aquatic life and is used for drinking water and recreation downstream.
As a French plant serving about 5,000 people, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant provides advanced treatment, exceeding the minimum requirement.
For agglomerations between 2,000 and 10,000 population equivalent, the EU directive mandates secondary treatment. Many plants in France also incorporate advanced treatment for nutrient removal, especially in sensitive areas.
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