Sully-sur-Loire Wastewater Treatment Plant, Centre-Val de Loire, France

The Sully-sur-Loire wastewater treatment plant is located in the commune of Sully-sur-Loire, in the Loiret department of the Centre-Val de Loire region, France. The facility serves a population of approximately 5,000 residents and operates with advanced treatment processes, ensuring high-quality effluent before discharge. As a plant in France, it operates under the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The advanced treatment level indicates that the plant goes beyond secondary treatment, likely including nutrient removal or other tertiary processes to protect sensitive receiving waters. The treated effluent is discharged into the Loire River, which flows through the Loire Valley, a UNESCO World Heritage site known for its rich biodiversity and cultural landscape. The river eventually reaches the Atlantic Ocean near Saint-Nazaire. The plant's advanced treatment helps protect the Loire's water quality and its downstream ecosystems.

The plant discharges into the Loire River, which flows through the Loire Valley before reaching the Atlantic Ocean. The Loire is one of France's longest rivers and supports diverse aquatic life, including migratory fish species such as Atlantic salmon and European eel. The advanced treatment helps minimize nutrient pollution, which is critical for preventing eutrophication in the river and its estuary.