Morainvilliers Wastewater Treatment Plant, Île-de-France | France

The Morainvilliers wastewater treatment plant is located in the commune of Morainvilliers, within the Yvelines department of the Île-de-France region, approximately 30 kilometers west of Paris. The facility serves a population of about 11,689 residents, classifying it as a medium-sized agglomeration under EU regulations. As a French wastewater treatment plant, Morainvilliers operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent between 10,000 and 150,000. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant's treatment processes are designed to meet these regulatory standards, ensuring compliance with French and European water quality objectives. The treated effluent from the Morainvilliers plant is discharged into the local hydrological network, which ultimately drains into the Seine River basin. The Seine flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and providing drinking water for millions. The plant plays a crucial role in protecting downstream water quality and the ecological health of the Seine estuary.

The Morainvilliers plant discharges into the Seine River basin, which flows through the Paris region and eventually into the English Channel. The Seine estuary is an ecologically sensitive area that supports diverse fish populations and migratory bird species. The plant's operations help reduce nutrient and pollutant loads, contributing to the overall health of the Seine watershed and the marine environment.