Łękno Wastewater Treatment Plant - Województwo Wielkopolskie, Poland

The Łękno wastewater treatment plant is located in the village of Łękno, within the gmina Zaniemyśl in województwo wielkopolskie, Poland. This facility serves a population of 2,480, 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. With a designed capacity of 7,875 m³/day and an actual discharge volume of 353.61 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variations. The treated effluent is discharged into local watercourses that eventually drain into the Warta River basin, a major tributary of the Oder River. The Oder flows into the Baltic Sea, making the plant's performance important for the ecological health of the Baltic Sea catchment area.

The plant discharges into the Warta River basin, which flows into the Oder River and ultimately reaches the Baltic Sea. The Baltic Sea is a semi-enclosed sea with limited water exchange, making it sensitive to nutrient pollution. Secondary treatment at this plant helps reduce organic load and nutrients, supporting the ecological balance of downstream waters and the Baltic Sea ecosystem.