LIMOGES Wastewater Treatment Plant, Limoges, Nouvelle-Aquitaine, France

The LIMOGES wastewater treatment plant is located in Limoges, Nouvelle-Aquitaine, France, along the Vienne River. It serves a population of approximately 235,000, classifying it as a large agglomeration under European Union regulations. The plant is situated in an inland area, more than 50 km from the coast. As a large agglomeration, the plant is required to meet the standards of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for all discharges and tertiary treatment in sensitive areas. The Vienne River basin is designated as a sensitive area due to eutrophication risks, so the plant likely employs advanced treatment to reduce nitrogen and phosphorus loads. The treated effluent is discharged into the Vienne River, a tributary of the Loire River, which flows into the Atlantic Ocean. The plant plays a critical role in protecting the water quality of the Vienne and Loire rivers, supporting aquatic ecosystems and downstream uses such as drinking water supply and recreation.

The plant discharges into the Vienne River, which flows into the Loire River, the longest river in France, before reaching the Atlantic Ocean. The Vienne River supports diverse aquatic life, including migratory fish species such as salmon and eels. The Loire basin is ecologically sensitive, with extensive floodplain wetlands and habitats for rare birds and plants. Nutrient removal at the plant helps prevent eutrophication in the river and downstream estuary.