CIRES LES MELLO Wastewater Treatment Plant | Cires-lès-Mello, Hauts-de-France

CIRES LES MELLO is an advanced wastewater treatment plant located in Cires-lès-Mello, a commune in the Oise department of Hauts-de-France, France. The plant serves a population equivalent of 3,955 and is part of the region's municipal wastewater infrastructure. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 8,000 m³/day and a reported discharge volume of 705.56 m³/day, it operates well within its capacity. As a French facility, it complies with national regulations transposing the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment levels for agglomerations of this size. The treated effluent is discharged into the local watershed, which ultimately drains into the Oise River, a major tributary of the Seine. The Seine River flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and providing water for human use. The plant's advanced treatment helps protect downstream water quality in this densely populated and agriculturally active region.

The plant discharges into the Oise River basin, which flows into the Seine River and eventually the English Channel. This watershed supports diverse aquatic life and is an important ecological corridor in northern France. The advanced treatment level helps reduce nutrient loading, protecting downstream water bodies from eutrophication and maintaining water quality for both human and ecological uses.