MARLENS CHAMPS FROIDS Wastewater Treatment Plant, Val de Chaise, Auvergne-Rhône-Alpes

MARLENS CHAMPS FROIDS is a wastewater treatment plant located in Val de Chaise, a commune in the Haute-Savoie department of the Auvergne-Rhône-Alpes region, France. The plant serves a population of about 13,671 people, placing it in the medium agglomeration category under EU regulations. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. Compliance with the directive ensures appropriate treatment standards. The plant discharges treated effluent into local waterways that ultimately drain into the Rhône River basin. The Rhône flows into the Mediterranean Sea, supporting diverse aquatic ecosystems. The surrounding Alpine region is ecologically sensitive, with numerous streams and rivers that provide habitat for fish and other aquatic life.

The plant's treated effluent enters local watercourses that feed into the Rhône River, one of Europe's major rivers, which flows into the Mediterranean Sea. The Alpine watershed is characterized by fast-flowing streams and high water quality standards. The downstream environment supports diverse aquatic life, including fish species such as brown trout and grayling, and the river system is important for regional biodiversity.