SAINT MARD Wastewater Treatment Plant, Juilly, France

SAINT MARD is an advanced wastewater treatment plant located in Juilly, within the Seine-et-Marne department of France. The plant serves a population of approximately 3,305 and has a designed capacity of 4,000 m³/day, with an average discharge volume of 589.61 m³/day. It operates under France's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment for agglomerations of this scale. The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. As a facility serving a small agglomeration, it meets the EU directive's requirements for secondary treatment, with advanced treatment providing additional nutrient removal. The plant's capacity utilization is low relative to its design, indicating potential for future growth or seasonal variability. The treated effluent from SAINT MARD is discharged into local watercourses that ultimately drain into the Seine River basin. The Seine River flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and providing water for agricultural and industrial use. The plant's advanced treatment helps protect downstream water quality in this densely populated region.

SAINT MARD discharges into the Seine River basin, which flows through the Île-de-France region and eventually reaches the English Channel. The Seine supports a variety of fish species and is an important ecological corridor. The plant's advanced treatment reduces nutrient loads, helping to mitigate eutrophication risks in the river and coastal waters.