NOGENT SUR VERNISSON Wastewater Treatment Plant, Nogent-sur-Vernisson, France

NOGENT SUR VERNISSON is a wastewater treatment plant located in Nogent-sur-Vernisson, a commune in the Loiret department of Centre-Val de Loire, France. The plant serves a population of approximately 1,912 residents and has a designed capacity of 3,500 cubic meters per day, with an average discharge volume of 341.10 m³/day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent French and European standards. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but advanced treatment is often implemented in sensitive areas to protect water quality. The plant discharges treated effluent into the local watershed, which ultimately drains into the Loire River basin. The Loire is one of France's major rivers, supporting diverse aquatic ecosystems and providing water for agriculture and drinking water downstream. The advanced treatment helps minimize nutrient loading and protects the ecological health of the receiving waters.

The plant discharges into the Vernisson River, a tributary of the Loing River, which flows into the Seine River before reaching the English Channel. The Loire basin is ecologically significant, hosting diverse fish species and migratory birds. Advanced treatment reduces phosphorus and nitrogen loads, helping to prevent eutrophication in downstream waters and supporting the ecological balance of the Seine estuary.