GRUGNY Wastewater Treatment Plant, La Houssaye-Béranger, Normandy

GRUGNY is a wastewater treatment plant located in La Houssaye-Béranger, a commune in the Seine-Maritime department of Normandy, France. The plant serves a population of approximately 2,800 people and is part of the region's municipal wastewater infrastructure. It is situated near the town of Rouen, within the broader Normandy region. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 2,900 m³/day and a current discharge volume of 499.52 m³/day, the facility operates well within its capacity. Advanced treatment typically includes nutrient removal to protect sensitive water bodies. The treated effluent is discharged into local watercourses that eventually drain into the Seine River basin and the English Channel. The plant's advanced treatment helps protect downstream ecosystems, including the Seine estuary, which supports diverse aquatic life and is an important migratory corridor for fish species.

The plant discharges into local streams that flow into the Seine River, which empties into the English Channel via the Seine estuary. The estuary is ecologically sensitive, supporting diverse aquatic life and serving as a critical habitat for migratory birds and fish. Advanced treatment at GRUGNY helps reduce nutrient loads, protecting water quality in the downstream environment.