Tann Wastewater Treatment Plant, Tann, Bayern, Germany

Tann wastewater treatment plant is located in the town of Tann, in the Landkreis Rottal-Inn district of Bayern, Germany. The facility serves a population of approximately 3,100 people and operates with advanced treatment technology, ensuring high-quality effluent. The plant has a designed capacity of 12,000 m³/day and currently treats a wastewater discharge volume of 506.83 thousand m³ per year. As a German facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates advanced treatment for sensitive areas and secondary treatment as a minimum for agglomerations of this size. The treated effluent is discharged into local water bodies that ultimately drain into the Danube River basin, contributing to the protection of the Black Sea ecosystem. The advanced treatment level helps reduce nutrient loads and supports the ecological health of downstream waters.

The plant discharges into the Rott River, a tributary of the Inn River, which flows into the Danube. The Danube is a major European waterway that drains into the Black Sea. The advanced treatment at Tann helps reduce nutrient pollution, protecting aquatic life in the Rott and downstream ecosystems, including the Danube Delta, a region of high ecological importance.