ROMILLY SUR ANDELLE 2 Wastewater Treatment Plant, Romilly-sur-Andelle, Normandy

ROMILLY SUR ANDELLE 2 is a municipal wastewater treatment plant located in Romilly-sur-Andelle, a commune in the Eure department of Normandy, France. The plant serves a population of 4,160 and has a designed capacity of 7,100 cubic meters per day, with an average discharge volume of 742.14 cubic meters per day. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. French regulations transpose this directive, and plants serving between 2,000 and 10,000 population equivalents are typically required to achieve secondary treatment standards. The treated effluent is discharged into the local water system, which ultimately drains into the Andelle River, a tributary of the Seine. The Seine River flows through the Paris Basin and into the English Channel, supporting diverse aquatic life and serving as an important ecological corridor in the region.

The plant discharges into the Andelle River, which flows into the Seine River and eventually reaches the English Channel. The Seine basin supports a variety of fish species, including Atlantic salmon and sea trout, and provides critical habitat for migratory birds. The treatment plant's secondary treatment helps reduce organic pollution and protect downstream water quality in this ecologically sensitive river system.