Innernzell Wastewater Treatment Plant, Gmünd, Bavaria

The Innernzell wastewater treatment plant is located in the Gmünd district of Innernzell, within the Bavarian county of Freyung-Grafenau, Germany. It serves a population of approximately 2,506 residents as part of the region's municipal wastewater infrastructure. The plant provides secondary treatment, meeting the standard requirements under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,600 m³/day and an average daily discharge of 634.21 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 Danube River basin, contributing to the Black Sea watershed. The plant plays a key role in protecting the region's streams and rivers from nutrient pollution, supporting aquatic life and downstream water quality.

The plant discharges into local streams that feed into the Danube River basin, which flows through several countries before reaching the Black Sea. The region is characterized by forested uplands and small agricultural valleys, where maintaining low nutrient levels in surface waters is critical for preserving biodiversity and preventing eutrophication in downstream lakes and reservoirs.