LA POSSONIERE nouvelle Wastewater Treatment Plant, La Possonnière, Pays de la Loire

LA POSSONIERE nouvelle is a wastewater treatment facility located in La Possonnière, a commune in the Maine-et-Loire department of the Pays de la Loire region, France. The plant serves a population of 2,260 and has a designed capacity of 2,500 m³/day, with an average discharge volume of 403.18 m³/day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, and advanced treatment is often mandated in sensitive areas to protect water quality. The treated effluent is discharged into the Loire River basin, which flows into the Atlantic Ocean. The Loire is one of France's major rivers, supporting diverse aquatic ecosystems and providing water for agriculture, industry, and recreation. The plant's advanced treatment helps protect downstream water quality and ecological health.

The plant discharges into the Loire River, which flows westward through the Pays de la Loire region and into the Bay of Biscay (Atlantic Ocean). The Loire basin is ecologically significant, supporting migratory fish species such as Atlantic salmon and European eel, as well as diverse birdlife in its floodplain wetlands. Advanced treatment at this plant helps reduce nutrient loading, which can cause eutrophication in downstream coastal waters.