VIOLAY Chez Perasse Wastewater Treatment Plant, Violay, France

VIOLAY Chez Perasse is an advanced wastewater treatment plant located in Violay, a commune in the Loire department of the Auvergne-Rhône-Alpes region, France. The plant serves a population of approximately 1,613 people and is designed with a capacity of 2,350 m³ per day, with a discharge volume of 287.76 m³/day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size (under 2,000 population equivalent) are typically required to provide appropriate treatment, and advanced treatment is often implemented in sensitive areas to protect water quality. 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 flows into the Atlantic Ocean. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports the ecological health of the Loire River and its tributaries.

The plant discharges into the local watershed within the Loire River basin, which flows westward through central France before emptying into the Atlantic Ocean near Saint-Nazaire. The Loire basin supports diverse aquatic life, including migratory fish species such as Atlantic salmon and European eel. Advanced treatment at this plant helps reduce nutrient loading, protecting downstream water quality and ecological balance.