Agen Wastewater Treatment Plant: Serving 57,000 People in Nouvelle-Aquitaine, France

The Agen wastewater treatment plant is located in the city of Agen, in the Lot-et-Garonne department of Nouvelle-Aquitaine, France. It serves a population of approximately 57,000, classifying it as a medium agglomeration under EU regulations. The plant is situated on the banks of the Garonne River, which flows through the city. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations between 10,000 and 150,000 population equivalent. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant's discharge is regulated by French authorities under the national water law. The treated effluent is discharged into the Garonne River, which flows northwest through Bordeaux and into the Gironde estuary, eventually reaching the Atlantic Ocean. The Garonne is a major river in southwestern France, supporting diverse aquatic life and providing water for agriculture and industry. The plant plays a key role in protecting the river's water quality and the downstream ecosystems.

The plant discharges into the Garonne River, which flows through the Aquitaine region and joins the Dordogne to form the Gironde estuary, the largest estuary in western Europe. The estuary is a critical habitat for migratory fish such as salmon and sturgeon, and supports a rich diversity of birdlife. The plant's treatment helps maintain water quality in this ecologically sensitive river system.