LAVEISSIERE LE LIORAN Wastewater Treatment Plant, Super Lioran, France

LAVEISSIERE LE LIORAN is a wastewater treatment plant located in Super Lioran, within the commune of Laveissière in the Cantal department of Auvergne-Rhône-Alpes, France. The plant serves a population of approximately 5,666 people, placing it in the small-to-medium agglomeration category under EU regulations. As a French plant serving fewer than 10,000 population equivalents, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires appropriate treatment based on the sensitivity of the receiving environment. For inland plants in this population range, secondary treatment is typically mandated unless the receiving waters are designated as sensitive areas requiring more advanced treatment. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Alagnon River, a tributary of the Allier River, which flows into the Loire River and eventually reaches the Atlantic Ocean. The surrounding region is part of the Massif Central, a mountainous area with numerous rivers and streams that support diverse aquatic ecosystems.

The plant discharges into the Alagnon River basin, which flows into the Allier River, a major tributary of the Loire River. The Loire is one of France's longest rivers, emptying into the Atlantic Ocean. The watershed supports diverse aquatic life, including migratory fish species such as Atlantic salmon and European eel. The region's mountainous terrain and relatively pristine waters require careful management of nutrient loads to prevent eutrophication.