ESVRES SUR INDRE Les Grands Regains Wastewater Treatment Plant, Esvres, France

ESVRES SUR INDRE Les Grands Regains is a municipal wastewater treatment plant located in Esvres, a commune in the Indre-et-Loire department of the Centre-Val de Loire region, France. The plant serves a population of approximately 2,850 and is designed to handle a capacity of 3,500 cubic meters per day, with a current discharge volume of 508.44 cubic meters per day. 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. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters, aligning with France's implementation of the directive in sensitive areas. The treated effluent is discharged into the local watershed, which ultimately drains into the Indre River, a tributary of the Loire River. The Loire River is a major European river that flows into the Atlantic Ocean, supporting diverse aquatic ecosystems and providing water for agriculture and recreation. The plant's advanced treatment helps maintain water quality in this ecologically significant basin.

The plant discharges into the Indre River, a tributary of the Loire River, which flows into the Bay of Biscay (Atlantic Ocean). The Loire basin is ecologically sensitive, supporting diverse aquatic life including migratory fish species such as Atlantic salmon and European eel. Advanced treatment at this plant reduces nutrient loading, helping to prevent eutrophication in downstream waters.