ROANNE Les 3 Ponts Wastewater Treatment Plant, Roanne, France

ROANNE Les 3 Ponts is a major wastewater treatment plant located in Roanne, within the Auvergne-Rhône-Alpes region of France. Serving a population of approximately 352,000, it is classified as a large agglomeration under EU regulations, requiring advanced treatment to protect sensitive water bodies. As a large-scale facility, the plant is expected to meet stringent treatment standards under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum and tertiary treatment for discharges into sensitive areas. The plant's capacity and treatment processes are designed to handle the significant load from the Roanne urban area. The treated effluent is discharged into the Loire River, one of France's major waterways, which flows northward through the Loire Valley and ultimately into the Atlantic Ocean. The plant plays a crucial role in protecting the Loire's water quality, supporting aquatic ecosystems and downstream communities.

The plant discharges into the Loire River, which flows through the Loire Valley and into the Bay of Biscay (Atlantic Ocean). The Loire is a vital ecological corridor supporting diverse aquatic life, including migratory fish species. The plant's operations help maintain water quality in this important river system, which is subject to EU water quality standards.