La Lechere Aigueblanche Wastewater Treatment Plant, La Léchère, France

La Lechere Aigueblanche is a wastewater treatment plant located in La Léchère, a commune in the Savoie department of the Auvergne-Rhône-Alpes region, France. The plant serves a population of approximately 28,209, placing it in the medium agglomeration category under EU regulations. It is situated in the Alpine valley of the Isère River, a region known for its mountainous terrain and tourism. As a French wastewater facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwater. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. The regulatory framework ensures compliance with national and EU standards. The treated effluent is discharged into the local watershed, which ultimately flows into the Isère River, a major tributary of the Rhône. The Rhône River then drains into the Mediterranean Sea. The Alpine environment supports diverse aquatic life, and the plant plays a key role in protecting water quality in this ecologically sensitive region.

The plant discharges into the Isère River basin, which flows through the Savoie Alps before joining the Rhône River near Valence. The Rhône then continues to the Mediterranean Sea. This watershed supports diverse aquatic ecosystems, including fish species such as brown trout and grayling. The Alpine context means the river is sensitive to nutrient inputs, and the plant's treatment helps maintain water quality for downstream communities and habitats.