Charly Nouvelle Wastewater Treatment Plant, Charly-sur-Marne, Hauts-de-France

The Charly Nouvelle wastewater treatment plant is located in Charly-sur-Marne, a commune in the Aisne department of Hauts-de-France, northern France. The facility serves a population of approximately 6,833 people, placing it in the small-to-medium agglomeration category under French regulations. As a French wastewater treatment plant, it operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (between 2,000 and 10,000 population equivalent), the directive requires appropriate treatment, typically secondary treatment, unless the receiving waters are designated as sensitive areas requiring more stringent treatment. The plant's treated effluent is discharged into the Marne River, a major tributary of the Seine. The Marne flows westward through the Champagne region and joins the Seine near Paris, eventually reaching the English Channel. The plant plays a key role in protecting the Marne's water quality, which supports aquatic ecosystems and is used for recreation and drinking water downstream.

The plant discharges into the Marne River, which flows into the Seine River and ultimately the English Channel. The Marne watershed supports diverse aquatic life and is an important ecological corridor in the Seine basin. The river's water quality is critical for downstream uses including drinking water production and recreation, making effective wastewater treatment essential for maintaining ecological balance.