Menetou-Salon Bonnerin Wastewater Treatment Plant, Menetou-Salon, France

The Menetou-Salon Bonnerin wastewater treatment plant is located in the commune of Menetou-Salon, in the Cher department of the Centre-Val de Loire region, France. The plant serves a population of about 2,787, placing it in the small agglomeration category under French and EU regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Its designed capacity is 3,100 m³/day, and the reported discharge volume is 497.20 m³/day, indicating operational headroom. Treated effluent is discharged into the local watershed, which ultimately drains into the Loire River basin. The Loire is France's longest river and a ecologically significant waterway, supporting diverse aquatic life and serving as a migratory corridor for species such as Atlantic salmon and European eel.

The plant discharges into the local watercourse within the Loire River basin. The Loire River flows north and west through central France before emptying into the Bay of Biscay (Atlantic Ocean). The Loire basin is ecologically sensitive, supporting a variety of fish species and riparian habitats. The plant's advanced treatment helps protect downstream water quality in this important river system.