Cellettes Route de Seur Wastewater Treatment Plant, Cellettes, France

The Cellettes Route de Seur wastewater treatment plant is located in the commune of Cellettes, within the Loir-et-Cher department of the Centre-Val de Loire region in central France. The facility serves a population of approximately 1,935 residents, placing it in the small agglomeration category under French and European regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,500 m³/day and an actual discharge volume of 345.20 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Loire River, one of France's major waterways. The Loire River flows westward through the Loire Valley, a UNESCO World Heritage site, before reaching the Atlantic Ocean. The plant's advanced treatment helps protect the sensitive aquatic ecosystems of the Loire basin, including fish populations and migratory species.

The plant discharges into the Loire River basin, which flows through the Loire Valley to the Atlantic Ocean. The Loire is known for its diverse aquatic life, including Atlantic salmon and European eel, and supports extensive riparian habitats. Advanced treatment at this facility helps reduce nutrient loading and protects downstream water quality in this ecologically significant river system.