Zlotniki Kujawskie Wastewater Treatment Plant - Kuyavian-Pomeranian Voivodeship, Poland

The Zlotniki Kujawskie wastewater treatment plant is located in the village of Zlotniki Kujawskie, within the Kuyavian-Pomeranian Voivodeship of Poland. The facility serves a population of approximately 2,976 residents, 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 discharges into freshwater. With a designed capacity of 9,060 m³/day and an actual discharge volume of 424.33 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Vistula River basin, which flows into the Baltic Sea. The plant plays a key role in protecting local groundwater and surface water quality in this agricultural region of north-central Poland.

The plant discharges into the Vistula River basin, which flows northward through Poland and empties into the Baltic Sea via the Gulf of Gdansk. The local watershed includes agricultural lands and small water bodies that support diverse aquatic life. Protecting this system from nutrient pollution is critical, as the Baltic Sea is sensitive to eutrophication from nitrogen and phosphorus inputs.