AUBY Wastewater Treatment Plant, Auby, Hauts-de-France, France

The AUBY wastewater treatment plant is located in Auby, a commune in the Douai arrondissement of the Nord department in Hauts-de-France, France. The plant serves a population of approximately 21,958, placing it within the medium agglomeration category under EU regulations. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. Compliance with national and EU standards is expected. The treated effluent from the plant is discharged into local watercourses that ultimately drain into the North Sea via the Scheldt river basin. The region's waterways support diverse aquatic life and are important for both ecological balance and human use, including agriculture and recreation.

The AUBY plant discharges into the local river network, which flows into the Scheldt basin and eventually reaches the North Sea. This watershed supports a variety of fish species and aquatic habitats. The area is part of a densely populated and industrialized region, making effective wastewater treatment crucial for maintaining water quality and protecting downstream ecosystems.