PEILLONNEX Le THY Wastewater Treatment Plant, Peillonnex, France

PEILLONNEX Le THY is a wastewater treatment plant located in Peillonnex, a commune in the Haute-Savoie department of the Auvergne-Rhône-Alpes region in southeastern France. The plant serves a population of approximately 10,000 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 plant has a designed capacity of 1.00 (likely in thousands of cubic meters per day or population equivalent), and it is expected to meet the directive's standards for biological treatment and nutrient removal where applicable. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Arve River, a tributary of the Rhône. The Rhône flows into the Mediterranean Sea, making the plant's operations important for downstream water quality in both the river system and the coastal environment.

The plant's treated effluent enters the local hydrographic network, which feeds into the Arve River and subsequently the Rhône River. The Rhône is one of Europe's major rivers, supporting diverse aquatic life and providing water for agriculture and urban use. The downstream environment includes ecologically sensitive areas along the Rhône corridor, which hosts migratory fish species and wetland habitats. Proper treatment helps protect these ecosystems from nutrient pollution and pathogens.