Overview
Saint Germain de la Grange wastewater treatment plant in Saint-Germain-de-la-Grange, Île-de-France, France, serves 1,245 people with secondary treatment. It discharges 222.11 m³/day and has a designed capacity of 2,000 m³/day.
The Saint Germain de la Grange wastewater treatment plant is located in the commune of Saint-Germain-de-la-Grange, within the Rambouillet arrondissement of Yvelines, Île-de-France. This facility serves a population of 1,245 and is part of the region's municipal wastewater infrastructure, operating under French and European regulatory frameworks. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 2,000 m³/day and an average daily flow of 222.11 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 Seine River basin. The Seine flows through Paris and into the English Channel, supporting diverse aquatic life and providing water for agriculture, industry, and recreation. The plant's secondary treatment helps protect downstream water quality and ecosystems.
Environmental context
The plant discharges into the local watercourse, which is part of the Seine River basin. The Seine flows northwest through Île-de-France and Normandy before emptying into the English Channel. This watershed supports a variety of fish species, including pike and perch, and provides critical habitat for migratory birds. The secondary treatment process reduces organic pollutants and nutrients, helping to maintain the ecological balance of the receiving waters and prevent eutrophication in downstream estuaries.
Frequently asked questions
The plant is located at Rue des Meulantais in Saint-Germain-de-la-Grange, within the Rambouillet arrondissement of Yvelines, Île-de-France, France.
The plant serves a population of 1,245 people in the commune of Saint-Germain-de-la-Grange and surrounding areas.
The plant provides secondary treatment, which typically involves biological processes to break down organic matter and reduce pollutants before discharge.
The treated effluent is discharged into the local watershed, which is part of the Seine River basin. The Seine ultimately flows into the English Channel.
As a French wastewater treatment plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent above 2,000. For smaller plants like this, national regulations ensure appropriate treatment levels.
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