Hebertsfelden Wastewater Treatment Plant, Linden, Bavaria

The Hebertsfelden wastewater treatment plant is located in the Linden district of Hebertsfelden, in the Landkreis Rottal-Inn region of Bavaria, Germany. It serves a population of approximately 3,000 people, classifying it as a small agglomeration under German 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. With a designed capacity of 4,150 m³/day and an actual discharge volume of 677.48 m³/day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Rott River, a tributary of the Inn River, which flows into the Danube and then the Black Sea. The plant plays a key role in protecting the water quality of these rivers and the downstream ecosystems, including the Danube Delta, a region of high ecological importance.

The plant discharges into local streams that feed the Rott River, a tributary of the Inn River. The Inn flows into the Danube, which traverses Central and Eastern Europe before reaching the Black Sea. The Danube basin supports diverse aquatic life and is a critical migratory corridor for fish species. The advanced treatment at Hebertsfelden helps reduce nutrient loads that could otherwise contribute to eutrophication in downstream waters.