WASSY Wastewater Treatment Plant, Wassy, Grand Est, France

The WASSY wastewater treatment plant is located in Wassy, a commune in the Haute-Marne department of the Grand Est region, France. The facility serves a population of approximately 4,900 residents and has a designed capacity of 5,000 cubic meters per day, with an average discharge volume of 874.15 cubic meters per day. As an advanced treatment plant, WASSY goes beyond the secondary treatment requirements mandated by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive requires secondary treatment for populations between 2,000 and 10,000, but the plant's advanced level indicates additional nutrient removal or other tertiary processes, likely to protect sensitive receiving waters. The plant discharges treated wastewater into local watercourses that ultimately drain into the Marne River basin, a tributary of the Seine River. The Seine flows through Paris and into the English Channel. The advanced treatment helps reduce nutrient loading and protect downstream aquatic ecosystems in this agriculturally intensive region.

The WASSY plant discharges into the local watershed that feeds the Marne River, a major tributary of the Seine. The Seine River basin supports diverse aquatic life and is an important ecological corridor in northern France. Advanced treatment at this plant helps mitigate eutrophication risks in the river system, particularly from nitrogen and phosphorus, which are concerns in agricultural areas like Grand Est.