MONEIN 2 Wastewater Treatment Plant, Monein, Nouvelle-Aquitaine

MONEIN 2 is an advanced wastewater treatment plant located in Monein, a commune in the Pyrénées-Atlantiques department of Nouvelle-Aquitaine, southwestern France. The plant serves a population of approximately 3,137 residents and is part of the region's municipal wastewater infrastructure. As an advanced treatment facility, MONEIN 2 goes beyond secondary treatment to remove nutrients and other pollutants, ensuring high-quality effluent. The plant has a designed capacity of 5,925 m³/day and currently discharges 559.64 m³/day, indicating significant reserve capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but MONEIN 2 exceeds this standard with advanced treatment. The treated effluent from MONEIN 2 is discharged into the local watershed, which ultimately drains into the Gave de Pau river and then the Adour river before reaching the Bay of Biscay. The plant plays a key role in protecting the region's water quality and supporting the ecological health of downstream aquatic environments.

MONEIN 2 discharges into the Gave de Pau river basin, which flows into the Adour river and then the Bay of Biscay. The watershed supports diverse aquatic life and is important for migratory fish species. The plant's advanced treatment helps minimize nutrient loading and protects downstream water quality in this ecologically sensitive region.