SAINT YORRE Wastewater Treatment Plant, Saint-Yorre, Auvergne-Rhône-Alpes

SAINT YORRE is a wastewater treatment plant located in Saint-Yorre, a commune in the Allier department of Auvergne-Rhône-Alpes, France. The plant serves a population of approximately 3,500 residents and is part of the municipal infrastructure managed by the local authority. 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. With a designed capacity of 8,217 m³/day and an actual discharge volume of 624.39 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Loire River basin. The Loire is the longest river in France and supports diverse aquatic ecosystems. The advanced treatment helps protect downstream water quality and contributes to the ecological health of the Loire Valley.

The plant discharges into the local water system that flows into the Allier River, a major tributary of the Loire River. The Loire basin is ecologically sensitive, supporting diverse aquatic life including migratory fish species such as Atlantic salmon and European eel. Advanced treatment at this plant helps reduce nutrient and pollutant loads, protecting the downstream riverine and estuarine environments.