Pommelsbrunn OT Hartmannshof Wastewater Treatment Plant, Bavaria, Germany

Pommelsbrunn OT Hartmannshof is a former wastewater treatment plant located in the village of Hartmannshof, part of the Pommelsbrunn municipality in the Nürnberger Land district of Bavaria, Germany. The plant served a population of approximately 2,353 people and had a designed capacity of 3,500 cubic meters per day, indicating it was sized for a small agglomeration. The plant provided secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into freshwater bodies. Although the plant is now closed, its operational history reflects the regulatory framework for small communities in Germany, where treatment standards are enforced by state authorities (Länder) under national water law. The plant's discharge likely entered a local stream within the Pegnitz river basin, which flows through Franconia and eventually joins the Regnitz and Main rivers, draining into the Rhine and ultimately the North Sea. The surrounding area is characterized by mixed forest and agricultural land, with the Hersbrucker Alb region known for its karst landscapes and sensitive groundwater resources.

The plant discharged into a small tributary of the Pegnitz River, part of the Rhine-Main-Danube watershed. The Pegnitz flows through the Franconian Jura, a region with karst geology where groundwater is highly vulnerable to contamination. Downstream, the river supports diverse aquatic life and is used for recreation and drinking water abstraction. The plant's closure likely reduced nutrient loading to this sensitive watercourse.