Keszyca Lesna Wastewater Treatment Plant - Kęszyca Leśna, Poland

Keszyca Lesna is a wastewater treatment plant located in Kęszyca Leśna, a village in the Lubusz Voivodeship of western Poland. The plant serves a population of 1,125, classifying it as a small agglomeration under Polish and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. It has a designed capacity of 1,517 m³/day and currently discharges 160.41 m³/day of treated wastewater. As a small inland facility, it operates under Polish environmental permits aligned with EU directives. The treated effluent is discharged into local watercourses that eventually drain into the Oder River basin, which flows north to the Baltic Sea. The plant plays a key role in protecting local streams and groundwater from untreated sewage, supporting the ecological health of the region's freshwater systems.

The plant discharges into small streams within the Oder River basin, which flows through western Poland and empties into the Szczecin Lagoon and the Baltic Sea. The local watershed supports diverse aquatic life and is part of a region with mixed agricultural and forested landscapes. Protecting these water bodies from nutrient pollution is critical for maintaining water quality in the downstream Oder estuary.