ZV Zellertal Sitz Arnbruck Wastewater Treatment Plant, Lesmannsried, Bavaria

ZV Zellertal Sitz Arnbruck is a wastewater treatment plant located in Lesmannsried, a district of Drachselsried in the Bavarian county of Regen, Germany. The plant serves a population of approximately 3,666 residents in this rural, inland community. As a German wastewater facility serving fewer than 10,000 people, the plant is classified as a small agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive requires appropriate treatment for discharges into freshwater bodies, typically secondary treatment, to protect water quality in the region's sensitive aquatic environments. The plant's treated effluent likely discharges into a local stream or river within the Danube basin, as the area drains toward the Black Sea. The surrounding Bavarian Forest region is ecologically significant, supporting diverse aquatic life and serving as a habitat for species such as the European otter and various fish populations.

The plant is situated in the Bavarian Forest, a low mountain range in southeastern Germany. Its treated wastewater likely flows into the Regen River, a tributary of the Danube, which ultimately drains into the Black Sea. The region's watershed supports sensitive aquatic ecosystems, including fish spawning grounds and riparian habitats that rely on clean water.