CHATEAU LANDON Wastewater Treatment Plant, Château-Landon, France

The CHATEAU LANDON wastewater treatment plant is located in Château-Landon, a commune in the Seine-et-Marne department of north-central France. It serves a population of approximately 2,900 residents, classifying it as a small agglomeration under French and EU regulations. The plant is situated in the metropolitan region of France and operates as part of the municipal infrastructure managed by local authorities. As a secondary treatment facility, the plant provides biological treatment to remove organic matter and suspended solids, meeting the standards required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The plant has a designed capacity of 3,000 m³/day and currently treats an average daily flow of 517.35 m³/day, indicating ample reserve capacity for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Seine River basin. The Seine River flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and providing water for agricultural and industrial uses downstream. The plant's secondary treatment helps protect these water bodies from organic pollution and nutrient loading.

The plant discharges into the Seine River basin, which flows through the Île-de-France region and eventually reaches the English Channel. The Seine supports a variety of fish species and is an important ecological corridor for migratory birds. Downstream, the river passes through urban and agricultural areas, making nutrient control critical to prevent eutrophication in the estuary and coastal zone.