AGV Mittlere Regnitz Wastewater Treatment Plant, Baiersdorf, Bavaria

AGV Mittlere Regnitz is a wastewater treatment plant located in Baiersdorf, in the Bavarian district of Erlangen-Höchstadt, Germany. The plant serves a population of around 15,545, placing it in the medium agglomeration category under the EU Urban Waste Water Treatment Directive (UWWTD). Under the EU UWWTD, agglomerations of this size are required to provide secondary treatment as a minimum. The plant operates within Germany's strict national water regulations, which implement the directive and often require advanced treatment in sensitive areas. The Regnitz river basin is part of the larger Rhine-Main-Danube watershed, which is ecologically significant. The treated effluent from AGV Mittlere Regnitz is discharged into the Regnitz River, a tributary of the Main River, which flows into the Rhine. The Rhine ultimately drains into the North Sea. The plant plays a key role in protecting the water quality of the Regnitz and downstream ecosystems, supporting aquatic life and biodiversity in this densely populated region.

The plant discharges into the Regnitz River, which flows into the Main River and then the Rhine, eventually reaching the North Sea. The Regnitz watershed supports diverse aquatic habitats and is an important corridor for migratory fish. The region's intensive agriculture and urban development make effective wastewater treatment critical to prevent nutrient pollution and maintain ecological balance in the downstream river systems.