ARACHES FLAINE Wastewater Treatment Plant, Magland, Auvergne-Rhône-Alpes

ARACHES FLAINE is a wastewater treatment plant located in Magland, within the Auvergne-Rhône-Alpes region of France. It serves the Flaine ski resort area, treating wastewater from a population equivalent of 12,000 people. The plant is situated in a mountainous Alpine environment, which presents unique operational challenges due to seasonal population fluctuations and cold climate conditions. As a French wastewater facility, the plant operates under the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. France implements this directive through national regulations, and plants serving populations over 10,000 are typically required to meet strict effluent standards. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day), indicating it is sized to handle peak tourist loads. The plant is located within 10 km of the coast, meaning its treated effluent ultimately reaches the Mediterranean Sea via the Arve River and the Rhône River. The Arve River flows through the Alpine valleys, supporting diverse aquatic life and providing water for local communities. The plant's discharge contributes to the water quality of this sensitive alpine watershed, which is important for both ecological health and recreational use.

The plant discharges into the Arve River, a tributary of the Rhône River, which flows into the Mediterranean Sea. The Arve River runs through the Alpine region, supporting a cold-water ecosystem with species such as brown trout and grayling. The watershed is ecologically sensitive due to its mountainous terrain and seasonal tourism pressures, making effective wastewater treatment critical for maintaining water quality and biodiversity.