LIMETZ VILLEZ Wastewater Treatment Plant, Notre-Dame-de-la-Mer, France

LIMETZ VILLEZ is an advanced wastewater treatment plant located in Notre-Dame-de-la-Mer, in the Yvelines department of Île-de-France, France. The plant serves a population of 1,745 and has a designed capacity of 3,600 m³/day, with a current discharge volume of 311.31 m³/day. It is situated inland, more than 50 km from the coast, and treats wastewater from the local community. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), advanced treatment is typically required for discharges into sensitive areas or for larger agglomerations. Although the plant serves a relatively small population, its advanced treatment level indicates a commitment to high effluent quality, likely to protect the receiving environment. The treated effluent is discharged into local watercourses that eventually drain into the Seine River basin. The Seine flows through Paris and into the English Channel, supporting diverse aquatic life and providing water for agriculture and industry. The plant's advanced treatment helps reduce nutrient loads and protect downstream ecosystems, including the Seine estuary and marine environment.

The plant discharges into the Seine River basin, which flows through Île-de-France and into the English Channel. The Seine supports a variety of fish species and is an important migratory corridor for eels and salmon. Downstream, the Seine estuary is a ecologically sensitive area with mudflats and marshes that provide habitat for birds and aquatic life. Advanced treatment at this plant helps minimize nutrient pollution and protects the river's ecological health.