Paris Seine Moree Wastewater Treatment Plant, Le Blanc-Mesnil, France

Paris Seine Moree is a wastewater treatment plant located in Le Blanc-Mesnil, a suburb northeast of Paris in the Île-de-France region. The plant serves a population of around 120,650 people, classifying it as a large agglomeration under EU regulations. It is part of the extensive sanitation network that protects the Seine River basin. As a plant serving over 100,000 people, it is subject to the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment as a minimum and tertiary treatment if discharging into sensitive areas. The plant's treatment processes are designed to meet these stringent standards, ensuring compliance with French and European water quality regulations. The treated effluent is discharged into the Seine River system, which flows through Paris and eventually into the English Channel. The plant plays a crucial role in protecting the Seine's water quality, supporting aquatic life, and maintaining the ecological balance of this major European waterway.

The plant discharges into the Seine River, which flows through Paris and drains into the English Channel. The Seine basin supports diverse aquatic ecosystems and is a vital resource for drinking water, agriculture, and recreation. The plant's operations help mitigate nutrient pollution and protect downstream habitats, including estuaries and coastal zones.