ZV Zellinger Becken Sitz Zellingen Wastewater Treatment Plant, Retzbach, Bavaria

ZV Zellinger Becken Sitz Zellingen is a wastewater treatment plant located in Retzbach, a district of Zellingen in the Main-Spessart district of Bavaria, Germany. The plant serves a population of approximately 20,000 people, classifying it as a medium-sized agglomeration under European Union regulations. As a German facility, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. It is expected to meet the regulatory standards for biological treatment. The treated effluent from the plant is discharged into the local watershed, which ultimately drains into the Main River, a major tributary of the Rhine. The Rhine basin is a vital ecological corridor in Europe, supporting diverse aquatic life and providing drinking water for millions. The plant plays a key role in protecting water quality in this important river system.

The plant discharges into the Main River basin, which flows into the Rhine River and eventually the North Sea. The Main River supports a variety of fish species, including barbel and chub, and the Rhine is a major migratory route for Atlantic salmon and eels. Protecting water quality in this watershed is critical for maintaining biodiversity and ensuring safe drinking water for downstream communities.