BAUVIN SE Wastewater Treatment Plant, Annœullin, Hauts-de-France

BAUVIN SE is a municipal wastewater treatment plant located in Annœullin, a commune in the Nord department of Hauts-de-France, France. The plant serves a population of approximately 8,183 people, classifying it as a small to medium agglomeration under EU regulations. It is situated in the Marais district near the Hameau de la Fosse, within the Lille metropolitan area. As a French wastewater facility, BAUVIN SE 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 appropriate treatment before discharge to inland waters. The plant is expected to meet these standards to protect local water quality. The plant discharges treated wastewater into the local water system, which ultimately drains into the North Sea via the Deûle River and the Scheldt basin. This region is part of the Scheldt watershed, supporting diverse aquatic life and agricultural water use. Proper treatment helps maintain the ecological health of these downstream environments.

BAUVIN SE discharges into the local Marais water system, which flows into the Deûle River, a tributary of the Scheldt. The Scheldt basin drains into the North Sea, supporting important estuarine and coastal ecosystems. The region's flat, low-lying terrain and dense population make effective wastewater treatment critical to prevent nutrient pollution and protect biodiversity in the downstream waterways.