Overview
Boulogne-sur-Gesse 3 is an advanced wastewater treatment plant in Occitanie, France, serving about 4,000 people. It discharges treated water into local waterways, supporting the Garonne River basin.
Boulogne-sur-Gesse 3 is a wastewater treatment plant located in the commune of Boulogne-sur-Gesse, in the Haute-Garonne department of Occitanie, southern France. The plant serves a population of approximately 4,000 residents and operates with advanced treatment technology, ensuring high-quality effluent before discharge. As an advanced treatment facility, Boulogne-sur-Gesse 3 goes beyond the secondary treatment requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive mandates secondary treatment for agglomerations of this size, but the plant's advanced processes provide additional nutrient removal, which is beneficial for sensitive receiving environments. The treated wastewater is discharged into local streams that flow into the Garonne River, a major watercourse in southwestern France. The Garonne ultimately reaches the Gironde estuary and the Atlantic Ocean. The plant's advanced treatment helps protect the ecological health of these downstream waters, supporting aquatic life and water quality in the region.
Environmental context
The plant discharges into the Garonne River basin, which drains into the Gironde estuary and the Atlantic Ocean. The Garonne supports diverse aquatic ecosystems, including migratory fish species such as salmon and eels. Advanced treatment at this plant reduces nutrient loads, helping to prevent eutrophication in downstream waters.
Frequently asked questions
Boulogne-sur-Gesse 3 is located on Route d'Aurignac in Boulogne-sur-Gesse, Haute-Garonne, Occitanie, France.
The plant serves approximately 4,000 residents in the Boulogne-sur-Gesse area.
Treated wastewater is discharged into local streams that flow into the Garonne River, which eventually reaches the Atlantic Ocean via the Gironde estuary.
The plant provides advanced treatment, which includes nutrient removal beyond secondary treatment, in line with EU standards for sensitive areas.
Under the EU Urban Waste Water Treatment Directive, agglomerations of this size typically require secondary treatment. The plant's advanced treatment exceeds these requirements, offering enhanced environmental protection.
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