ST JEAN DE LOSNE Wastewater Treatment Plant, Losne, France

The ST JEAN DE LOSNE wastewater treatment plant is located in Losne, a commune in the Côte-d'Or department of Bourgogne-Franche-Comté, France. Situated along the Quai de la Hutte, the plant serves a population of around 5,664 residents, classifying it as a small to medium agglomeration under EU regulations. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant is expected to comply with national standards derived from the directive. The plant discharges treated effluent 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 operations relevant to downstream water quality in both riverine and marine environments. The surrounding region is characterized by agricultural and rural landscapes, with the Saône supporting diverse aquatic life and ecological functions.

The plant's treated effluent enters the local watercourse, which flows into the Saône River near Losne. The Saône is a key river in eastern France, joining the Rhône at Lyon, which then discharges into the Mediterranean Sea. This watershed supports diverse aquatic ecosystems, including fish species such as pike and perch, and provides important habitat for migratory birds along the river corridors. The plant's location in a rural area means its discharge can influence local water quality, particularly in low-flow conditions.