SAINT JEAN LE VIEUX 01363 Wastewater Treatment Plant, Hauterive, France

SAINT JEAN LE VIEUX 01363 is a wastewater treatment plant located in Hauterive, within the commune of Saint-Jean-le-Vieux in the Ain department of Auvergne-Rhône-Alpes, France. The plant serves a population of approximately 2,900 and has a designed capacity of 3,200 m³/day, with an actual discharge volume of 517.35 m³/day. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters, aligning with French regulations for areas designated as sensitive under the directive. The treated effluent is discharged into the local watershed, which drains into the Ain River, a tributary of the Rhône. The Rhône River flows into the Mediterranean Sea. The plant's advanced treatment helps safeguard the ecological health of these water bodies, supporting aquatic life and downstream uses.

The plant discharges into the Ain River basin, which flows into the Rhône River and ultimately the Mediterranean Sea. The Ain River supports diverse aquatic ecosystems, including fish species such as brown trout and grayling. Advanced treatment at the plant reduces nutrient loads, helping to prevent eutrophication in downstream waters and protecting the ecological balance of the Rhône delta and coastal Mediterranean environment.