Gniewkowo Wastewater Treatment Plant | Secondary Treatment, Poland

The Gniewkowo wastewater treatment plant is located in the town of Gniewkowo, in the kujawsko-pomorskie province of Poland. It serves a population of approximately 3,579 residents, classifying it as a small agglomeration under Polish and EU regulations. As a secondary treatment facility, Gniewkowo meets the minimum treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The plant has a designed capacity of 12,954 m³/day and currently discharges an average of 510.31 m³/day of treated wastewater. The treated effluent is discharged into local watercourses that ultimately drain into the Vistula River basin, which flows northward into the Baltic Sea. The plant plays a key role in protecting local water quality and the downstream aquatic environment in the Vistula catchment.

The plant discharges into the Vistula River basin, which drains into the Baltic Sea. The Vistula is Poland's largest river and supports diverse aquatic life, including migratory fish species. The Baltic Sea is a semi-enclosed sea sensitive to nutrient pollution, making effective wastewater treatment crucial for reducing eutrophication risks.