FRONTENAY ROHAN ROHAN Wastewater Treatment Plant, Frontenay-Rohan-Rohan, France

FRONTENAY ROHAN ROHAN is a wastewater treatment plant located in Frontenay-Rohan-Rohan, a commune in the Deux-Sèvres department of Nouvelle-Aquitaine, France. The plant serves a population of about 4,068 and has a designed capacity of 5,734 cubic meters per day, with a reported discharge volume of 725.72 m³/day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent French and EU standards. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations between 2,000 and 10,000 population equivalent are required to provide appropriate treatment; advanced treatment is often mandated in sensitive areas to protect water quality. The plant discharges treated effluent into the local watershed, which ultimately drains into the Sèvre Niortaise river and then into the Bay of Biscay (Atlantic Ocean). Its advanced treatment helps safeguard the ecological health of the river and coastal environment, supporting biodiversity and recreational uses downstream.

The plant discharges into the Sèvre Niortaise river basin, which flows through the Marais Poitevin region, a vast wetland of ecological importance. The river eventually reaches the Bay of Biscay, a productive marine ecosystem. Advanced treatment at this plant reduces nutrient loading, helping to prevent eutrophication in the sensitive coastal waters and supporting aquatic life in the river and estuary.