ANNET SUR MARNE Wastewater Treatment Plant, Annet-sur-Marne, France

The ANNET SUR MARNE wastewater treatment plant is located in Annet-sur-Marne, a commune in the Seine-et-Marne department of north-central France. The plant serves a population of approximately 2,620 residents, providing advanced treatment to protect local water quality. As an advanced treatment facility, the plant goes beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 3,000 m³/day and an average discharge volume of 467.40 m³/day, the plant operates well within its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), French plants serving agglomerations under 10,000 population equivalent are required to provide appropriate treatment, and this facility meets that standard with its advanced processes. The plant discharges treated effluent into the local watershed, which ultimately drains into the Marne River, a major tributary of the Seine. The Seine River flows through Paris and into the English Channel, making the plant's advanced treatment important for downstream water quality and the ecological health of the Seine basin.

The plant discharges into the Marne River, which flows into the Seine River and eventually reaches the English Channel. The Seine basin supports diverse aquatic life and is an important ecological corridor. Advanced treatment at this plant helps reduce nutrient loading, protecting downstream water quality in the Marne and Seine rivers.