Zbojno Wastewater Treatment Plant, Wojnowo | Poland

The Zbojno wastewater treatment plant is located in Wojnowo, within the gmina Zbójno in the kujawsko-pomorskie province of Poland. It serves a population of 1,295, classifying it as a small agglomeration under Polish and EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the local municipal wastewater infrastructure. The facility provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The plant has a designed capacity of 2,015 m³/day and currently treats an average daily flow of 184.65 m³/day, indicating significant spare capacity. As a Polish facility, it operates under national regulations that transpose EU directives, with permits issued by the relevant regional water management authority. The treated effluent is discharged into local surface waters, contributing to the protection of the Vistula River basin, which ultimately drains into the Baltic Sea. The plant plays a key role in safeguarding water quality in the region, supporting aquatic ecosystems and downstream communities.

The plant discharges into local watercourses that are part of the Vistula River basin, the largest river system in Poland. The Vistula flows northward into the Baltic Sea, a semi-enclosed sea sensitive to nutrient pollution. The plant's secondary treatment helps reduce organic load and nutrients, mitigating eutrophication risks in downstream waters. The surrounding area includes agricultural lands and small water bodies that benefit from improved water quality.