SAINT GEOIRE EN VALDAINE Wastewater Treatment Plant, Saint-Geoire-en-Valdaine, France

SAINT GEOIRE EN VALDAINE is a municipal wastewater treatment plant located in Saint-Geoire-en-Valdaine, in the Isère department of Auvergne-Rhône-Alpes, France. The plant serves a population of 2,167 and is part of the region's wastewater infrastructure for small agglomerations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 1,350 m³/day and a current discharge volume of 386.59 m³/day, the plant operates well within its capacity. The treated effluent is discharged into local watercourses that eventually drain into the Rhône River basin. The plant plays a key role in protecting the local watershed and downstream ecosystems, including the Rhône River and its delta, by reducing organic pollutants and nutrients before discharge.

The plant discharges into local streams that flow into the Rhône River, one of Europe's major rivers, which ultimately reaches the Mediterranean Sea. The Rhône basin supports diverse aquatic life and is an important ecological corridor. Secondary treatment helps reduce nutrient loads, protecting downstream water quality and preventing eutrophication in sensitive coastal areas.