OPPY SE Wastewater Treatment Plant, Oppy, Hauts-de-France

OPPY SE is a municipal wastewater treatment plant located in Oppy, a commune in the Pas-de-Calais department of Hauts-de-France, France. The plant serves a population of approximately 1,033 people and is part of the region's wastewater infrastructure managed under French regulations. The plant provides secondary treatment, which is the standard level required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 2,200 m³/day and a discharge volume of 184.29 m³/day, the plant operates well within its capacity, ensuring effective treatment of domestic wastewater. The treated effluent is discharged into local watercourses that ultimately drain into the Scheldt River basin, flowing northward through Belgium and into the North Sea. The plant plays a key role in protecting the region's water quality and supporting the ecological health of downstream aquatic environments.

The plant discharges into local streams that are part of the Scheldt River basin, which flows through northern France and Belgium before reaching the North Sea. This watershed supports diverse aquatic life and is an important ecological corridor in the region. The secondary treatment provided by the plant helps reduce nutrient loads and organic pollution, safeguarding water quality in the downstream river system and coastal zone.