Overview
GRESSE EN VERCORS is a secondary wastewater treatment plant in Gresse-en-Vercors, Auvergne-Rhône-Alpes, France. It serves a population of 2,000 and discharges treated water into the local watershed.
GRESSE EN VERCORS is a wastewater treatment plant located in the commune of Gresse-en-Vercors, within the Isère department of the Auvergne-Rhône-Alpes region in southeastern France. The facility serves a population of approximately 2,000 residents, reflecting its role as a small-scale municipal treatment system in a mountainous area. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological oxidation and sedimentation to reduce organic matter and suspended solids. The plant has a designed capacity of 2,833 cubic meters per day and currently discharges an average volume of 356.8 cubic meters per day. The treated effluent is released into the local watershed, which ultimately drains into the Drac River, a tributary of the Isère River, and then into the Rhône River before reaching the Mediterranean Sea. The plant's operation helps protect the sensitive alpine ecosystems of the Vercors region, known for its karst landscapes and biodiversity.
Environmental context
The plant discharges into the local watershed of the Vercors massif, a mountainous area with karst geology and sensitive groundwater systems. The treated effluent flows into streams that feed the Drac River, a tributary of the Isère, which joins the Rhône River. The Rhône drains into the Mediterranean Sea, making the plant part of a large transboundary basin. The region supports diverse aquatic life and is an important area for migratory fish species.
Frequently asked questions
The plant is located at 51, Route du Col des Deux, Le Chomeil, Gresse-en-Vercors, in the Isère department of the Auvergne-Rhône-Alpes region, France.
The plant serves approximately 2,000 residents in the commune of Gresse-en-Vercors and surrounding areas.
The treated effluent is discharged into the local watershed, which flows into the Drac River, a tributary of the Isère River, and eventually reaches the Rhône River and the Mediterranean Sea.
The plant provides secondary treatment, which includes biological processes to reduce organic matter and suspended solids, meeting the requirements of the EU Urban Waste Water Treatment Directive for small agglomerations.
As a French plant serving fewer than 10,000 people, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size, and is subject to national regulations enforced by the French water agencies.
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