Val Saint Cyr, Le Val-Saint-Germain

Overview

Val Saint Cyr wastewater treatment plant serves Le Val-Saint-Germain, France, with secondary treatment for a population of 2,506. It discharges 447.07 m³/day of treated effluent.

Val Saint Cyr is a wastewater treatment plant located in Le Val-Saint-Germain, Essonne, in the Île-de-France region of France. It serves a population of approximately 2,506 people, classifying it as a small agglomeration under French and EU regulations. The plant is situated inland, away from coastal areas. The plant provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Its designed capacity is 3,000 m³/day, and the current discharge volume is 447.07 m³/day, indicating operational headroom. The facility is part of France's national wastewater infrastructure managed by local authorities. The treated effluent is discharged into local watercourses that ultimately drain into the Seine River basin. The Seine flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and serving as a critical water resource for the region. The plant plays a role in protecting downstream water quality in this densely populated and agriculturally active area.

Environmental context

The plant discharges into the Seine River basin, which drains into the English Channel. The Seine supports diverse aquatic life and is an important migratory corridor for fish species. The region's intensive agriculture and urban development place pressure on water quality, making secondary treatment essential for reducing organic pollutants and protecting downstream ecosystems.

Frequently asked questions

Val Saint Cyr is located in Le Val-Saint-Germain, Essonne, in the Île-de-France region of France, along Route de Granville.

The plant serves a population of 2,506 people, classifying it as a small agglomeration under EU wastewater directives.

The treated effluent is discharged into local watercourses that flow into the Seine River basin, ultimately reaching the English Channel.

Val Saint Cyr provides secondary treatment, which is the EU standard for freshwater discharges from agglomerations of this size under the Urban Waste Water Treatment Directive.

As a French plant, it operates under the EU Urban Waste Water Treatment Directive, transposed into French law, which mandates secondary treatment for small agglomerations discharging to freshwater.