CROTTET Ormets Wastewater Treatment Plant, Crottet, Auvergne-Rhône-Alpes

CROTTET Ormets is a wastewater treatment facility located in the commune of Crottet, within the Ain department of the Auvergne-Rhône-Alpes region in eastern France. The plant serves a population of approximately 2,100 residents, reflecting its role in managing municipal wastewater for this small agglomeration. The plant employs advanced treatment processes, which go beyond the secondary treatment standards required by the EU Urban Waste Water Treatment Directive (91/271/EEC). With a designed capacity of 2,700 m³ per day and a current discharge volume of 374.64 m³ per day, the facility operates well within its capacity, ensuring effective treatment of incoming wastewater. The treated effluent is discharged into the local watershed, which ultimately drains into the Saône River, a major tributary of the Rhône. The Rhône flows into the Mediterranean Sea, making the plant's advanced treatment important for protecting downstream water quality and aquatic ecosystems in the Rhône basin.

The plant discharges into the local water network that feeds the Saône River, a key tributary of the Rhône. The Rhône basin supports diverse aquatic life and is an important migratory corridor for fish species. Advanced treatment at this plant helps reduce nutrient loads and pollutants, contributing to the ecological health of the downstream rivers and the Mediterranean coastal zone.