THIVARS Wastewater Treatment Plant, Thivars, Centre-Val de Loire

THIVARS is a wastewater treatment plant located in Thivars, a commune in the Eure-et-Loir department of Centre-Val de Loire, France. The plant serves a population of approximately 2,431 people and is part of the municipal infrastructure managed by the local authority. The plant employs advanced treatment processes, ensuring a high level of effluent quality. With a designed capacity of 2,700 m³/day and a current discharge volume of 433.69 m³/day, it operates well below its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but THIVARS exceeds this standard with advanced treatment. The treated effluent is discharged into the local watershed, which ultimately drains into the Eure River, a tributary of the Seine. The Seine River flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and serving as a vital water resource for the region.

The plant discharges into the Eure River basin, which flows into the Seine River and eventually the English Channel. The Seine estuary is an ecologically sensitive area that supports migratory fish species and provides important habitat for aquatic birds. The advanced treatment at THIVARS helps protect downstream water quality in this densely populated and agriculturally active region.