La Rochelle Wastewater Treatment Plant: Serving La Rochelle, France

The La Rochelle wastewater treatment plant is a major municipal facility serving the city of La Rochelle, located in the Nouvelle-Aquitaine region of southwestern France. The plant handles wastewater from a population of about 174,000, classifying it as a large agglomeration under EU regulations. As a large agglomeration, the plant is required to meet stringent treatment standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive mandates secondary treatment as a minimum, with tertiary treatment required for discharges into sensitive areas. The plant's designed capacity is 1.00 (likely in cubic meters per day or similar unit), indicating its scale. The treated effluent is discharged into the Atlantic Ocean via the Pertuis d'Antioche, a strait between the Île de Ré and the mainland. The receiving waters support diverse marine life, including fish, crustaceans, and seabirds. The plant plays a crucial role in protecting the coastal environment and the Bay of Biscay ecosystem.

The plant discharges into the Pertuis d'Antioche, a coastal strait connecting to the Bay of Biscay and the Atlantic Ocean. This area supports diverse marine ecosystems, including seagrass beds and fish nurseries. The plant's treatment performance is critical to maintaining water quality in this ecologically sensitive coastal zone, which is also important for tourism and fisheries.