LEVIS SAINT NOM Wastewater Treatment Plant, Lévis-Saint-Nom, France

The LEVIS SAINT NOM wastewater treatment plant is located in Lévis-Saint-Nom, a commune in the Yvelines department of Île-de-France, France. The plant serves a population of about 9,364, classifying it as a small to medium agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). As part of the Paris region's extensive water management network, it plays a role in protecting local water quality. Under the EU UWWTD, agglomerations with a population equivalent (PE) between 2,000 and 10,000 are required to have appropriate treatment, typically secondary treatment. The plant's treatment process is designed to meet these standards, ensuring that effluent is adequately treated before discharge. The plant operates within the French regulatory framework, which implements the UWWTD through national legislation and permits issued by local authorities. The treated wastewater is discharged into the Yvette River, a tributary of the Orge, which flows into the Seine River. The Seine ultimately drains into the English Channel. This watercourse supports diverse aquatic life and is an important ecological corridor in the Île-de-France region. The plant's operations help maintain the ecological health of the Yvette and downstream waters.

The LEVIS SAINT NOM plant discharges into the Yvette River, a tributary of the Orge River, which flows into the Seine River. The Seine drains into the English Channel, supporting a rich ecosystem including fish species such as pike and perch. The Yvette watershed is ecologically sensitive, providing habitat for diverse aquatic life and serving as a green corridor in the urbanized Île-de-France region. Proper wastewater treatment is essential to prevent nutrient pollution and protect downstream water quality.