AUBIGNY EN ARTOIS SE Wastewater Treatment Plant, Agnières, Hauts-de-France

AUBIGNY EN ARTOIS SE is a municipal wastewater treatment plant located in Agnières, a commune in the Pas-de-Calais department of the Hauts-de-France region, northern France. The plant serves a population of approximately 1,316 residents, classifying it as a small agglomeration under French and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Its designed capacity is 2,500 m³/day, with an average daily discharge volume of about 235 m³, indicating ample reserve capacity for future growth or seasonal peaks. Treated effluent is discharged into the local watershed, which ultimately drains into the North Sea via the Scarpe River and the Scheldt basin. The plant plays a key role in protecting downstream water quality in this densely populated and agriculturally active region, supporting both ecological health and compliance with EU water quality standards.

The plant discharges into the Scarpe River catchment, part of the Scheldt basin, which flows through northern France and Belgium before reaching the North Sea. This watershed supports diverse aquatic life and is important for regional agriculture and drinking water supplies. The Hauts-de-France region has several ecologically sensitive areas along its rivers, and the plant's secondary treatment helps reduce nutrient and organic pollution loads to the downstream environment.