GUNSTETT Wastewater Treatment Plant, Biblisheim, Grand Est, France

GUNSTETT is a wastewater treatment plant located at 16 Rue du Moulin, Biblisheim, in the Bas-Rhin department of Grand Est, France. It serves a population equivalent of 9,600, placing it in the medium agglomeration category under EU regulations. The plant is situated inland, approximately 50 km from the coast, and its operations are part of the regional wastewater infrastructure managed by local authorities. The plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations between 2,000 and 10,000 population equivalent, the directive requires secondary treatment (biological treatment) as a minimum standard. In sensitive areas, more stringent tertiary treatment may be required. The plant's compliance is overseen by French water agencies, which enforce discharge permits based on the receiving water body's sensitivity. The treated effluent from GUNSTETT is discharged into local watercourses that ultimately drain into the Rhine River basin. The Rhine is a major European waterway flowing through Germany and the Netherlands into the North Sea. The plant's operations help protect the ecological health of the Rhine basin, which supports diverse aquatic life and serves as a critical migratory corridor for fish species. The region's agricultural and industrial activities also depend on maintaining good water quality in the catchment.

GUNSTETT discharges into local streams that flow into the Moder River, a tributary of the Rhine. The Rhine basin is a transboundary ecosystem supporting diverse aquatic habitats and serving as a major migratory route for fish such as salmon and eel. The region's water quality is managed under the EU Water Framework Directive, aiming for good ecological status. The plant's treatment helps reduce nutrient and pollutant loads entering the Rhine, which ultimately drains into the North Sea, a sensitive marine environment.