Woustviller Wastewater Treatment Plant, Grand Est, France

The Woustviller wastewater treatment plant is located in the commune of Woustviller, within the Sarreguemines arrondissement of Moselle, Grand Est, France. It serves a population of approximately 2,100 residents, classifying it as a small agglomeration under French and EU regulations. The plant 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. Its designed capacity is 4,200 m³/day, with an actual discharge volume of 374.64 m³/day, indicating ample reserve capacity. The treated effluent is discharged into local waterways that ultimately drain into the Rhine basin. The plant plays a key role in protecting the region's water quality, supporting both local ecosystems and downstream communities that rely on the Rhine River system.

The plant discharges into the local watershed, which is part of the Rhine basin. The Rhine is a major European river that flows through several countries before reaching the North Sea. The region supports diverse aquatic life and is an important migratory corridor for fish. Advanced treatment helps minimize nutrient and pollutant loads, protecting downstream water quality and ecological health.