WEYER Wastewater Treatment Plant, Weyer, Grand Est, France

The WEYER wastewater treatment plant is located in the commune of Weyer, in the Bas-Rhin department of the Grand Est region, France. It serves a population of approximately 3,100 people, classifying it as a small to medium agglomeration under French and EU regulations. The plant is situated inland, away from coastal areas, and treats wastewater from the local community. The facility employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The plant has a designed capacity of 5,500 m³/day and currently discharges an average volume of 553.03 m³/day, indicating significant spare capacity. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The treated effluent is discharged into local watercourses that eventually drain into the Rhine River basin. The Rhine is a major European waterway flowing through Germany and the Netherlands into the North Sea. The advanced treatment level helps protect the ecological quality of the Rhine and its tributaries, supporting aquatic life and downstream water uses.

The WEYER plant discharges into the local watershed, which is part of the Rhine River basin. The Rhine flows northward through Germany and the Netherlands before reaching the North Sea. This basin supports diverse aquatic ecosystems and is an important migratory corridor for fish. The advanced treatment at WEYER reduces nutrient loads, helping to prevent eutrophication in downstream waters and contributing to the ecological health of the Rhine.