SEES 2006 Wastewater Treatment Plant, Sées, Normandie, France

SEES 2006 is a wastewater treatment facility located in Sées, within the Normandie region of France. The plant serves a population of around 5,362 and operates with advanced treatment capabilities, ensuring high-quality effluent before discharge. Its location in the Orne department places it within a rural setting, where it plays a key role in managing local wastewater. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 8,450 cubic meters per day and a current discharge volume of approximately 956.57 cubic meters per day, the facility operates well within its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but SEES 2006 exceeds this standard with advanced treatment. The treated effluent is discharged into the local water system, which ultimately drains into the Orne River and then into the English Channel. This discharge supports the ecological health of the river, which is home to diverse aquatic life and serves as a corridor for migratory fish. The advanced treatment helps protect downstream water quality and the sensitive coastal environment.

SEES 2006 discharges into the Orne River basin, which flows northward through Normandie and empties into the English Channel at Ouistreham. The Orne River supports a variety of fish species, including Atlantic salmon and sea trout, and its estuary is an important habitat for migratory birds. The advanced treatment at this plant helps minimize nutrient loading and protects the river's ecological balance, particularly in the downstream coastal zone.