Lehrberg Wastewater Treatment Plant, Unterheßbach, Bavaria

The Lehrberg wastewater treatment plant is located in Unterheßbach, a district of Lehrberg in the Bavarian region of Germany. It serves a population of approximately 2,800 people, making it a small-scale municipal facility. The plant is situated inland, away from coastal areas, and operates under Germany's strict environmental regulations. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,500 m³/day and an average discharge of 708.61 m³/day, the plant operates well within its capacity. The treatment process ensures that effluent meets quality standards before discharge. The treated wastewater is discharged into local water bodies that eventually drain into the Rhine River basin, which flows into the North Sea. The plant plays a crucial role in protecting the local watershed and downstream ecosystems from pollution, supporting aquatic life and water quality in the region.

The plant discharges into small streams that feed into the Fränkische Rezat river, a tributary of the Rednitz and Regnitz rivers, which ultimately flow into the Main and then the Rhine River. The Rhine basin is a major European waterway supporting diverse aquatic ecosystems and providing drinking water for millions. The plant's secondary treatment helps reduce nutrient loads and organic pollutants, protecting downstream habitats and maintaining ecological balance in the watershed.