Selles-sur-Cher Thizardiere Wastewater Treatment Plant, Centre-Val de Loire

Selles-sur-Cher Thizardiere is a wastewater treatment plant located in Selles-sur-Cher, a commune in the Loir-et-Cher department of Centre-Val de Loire, France. The plant serves a population of 4,424 and has a designed capacity of 8,000 m³/day, with an average discharge volume of 789.23 m³/day. It operates under the French regulatory framework, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this scale. The plant provides advanced treatment, which goes beyond the secondary treatment required by the EU directive for inland areas. This level of treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. The plant's capacity utilization is low, indicating it is well-sized for current demand. The treated effluent is discharged into the Cher River, a tributary of the Loire River. The Loire basin is the largest river basin in France and supports diverse aquatic ecosystems. The plant's advanced treatment helps maintain water quality in the Cher and Loire rivers, which are important for biodiversity, recreation, and downstream water supply.

The plant discharges into the Cher River, which flows into the Loire River, eventually reaching the Atlantic Ocean. The Loire basin is ecologically significant, supporting species such as Atlantic salmon and European eel. Advanced treatment at this plant reduces nutrient loading, helping to prevent eutrophication in the river and its estuary.