ZV Untereisenheim Sitz Eisenheim Wastewater Treatment Plant, Landkreis Würzburg, Bayern

ZV Untereisenheim Sitz Eisenheim is a municipal wastewater treatment plant located in Eisenheim, within the Landkreis Würzburg district of Bayern, Germany. The plant serves a population of approximately 2,333 people, classifying it as a small agglomeration under German and EU regulations. It is situated inland, away from coastal areas, and its operations are integrated into the regional water management infrastructure. The plant provides secondary treatment, which is the standard biological treatment stage required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The designed capacity of 4,800 m³/day indicates the facility's ability to handle peak flows, while the current discharge volume of 373.33 m³/day reflects typical operational loads. As a German plant, it operates under the national Wasserhaushaltsgesetz (WHG) and is subject to state-level permitting by the Bavarian environmental authorities. The treated effluent is discharged into local watercourses that ultimately drain into the Main River basin, a major tributary of the Rhine. The Rhine-Main region supports diverse aquatic ecosystems and is an important corridor for migratory fish species. The plant's secondary treatment helps protect downstream water quality in this ecologically significant watershed.

The plant discharges into the Main River basin, which flows into the Rhine River and eventually the North Sea. The Rhine-Main watershed supports diverse aquatic life, including fish species such as salmon and eel, and is an important ecological corridor. Secondary treatment reduces organic load and nutrients, helping to maintain water quality in this sensitive river system.