RIVECOURT Wastewater Treatment Plant, Longueil-Sainte-Marie, Hauts-de-France

RIVECOURT is an advanced wastewater treatment plant located in Longueil-Sainte-Marie, a commune in the Oise department of Hauts-de-France, France. The plant serves a population of approximately 4,626 residents and has a designed capacity of 5,200 cubic meters per day, with a discharge volume of 825.27 cubic meters per day. As an advanced treatment facility, RIVECOURT goes beyond secondary treatment to remove nutrients and other pollutants, ensuring high-quality effluent. This level of treatment is typical for plants in sensitive areas under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires tertiary treatment for agglomerations discharging into sensitive catchments. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Oise River, a major tributary of the Seine River. The Seine flows through Paris and into the English Channel, supporting diverse aquatic life and providing water for agriculture and industry. The advanced treatment helps protect downstream ecosystems and water quality.

RIVECOURT discharges into the Oise River basin, which flows into the Seine River and eventually reaches the English Channel. The Seine estuary and coastal zone are ecologically sensitive, supporting migratory fish species and diverse bird populations. Advanced treatment at this plant reduces nutrient loading, helping to prevent eutrophication in downstream waters.