Kozienice Wastewater Treatment Plant – Serving Kozienice, Poland

The Kozienice wastewater treatment plant is located in the town of Kozienice, within the Mazowieckie region of Poland. Serving a population of around 22,000, it is classified as a medium agglomeration under EU regulations. The plant plays a key role in managing municipal wastewater for this community in central Poland. As a Polish facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are sensitive. The plant is expected to meet these EU standards to protect local water quality. The treated effluent from Kozienice is discharged into the Vistula River basin, Poland's largest river system. The Vistula flows northward through central Poland to the Baltic Sea, making the plant's performance important for downstream ecosystems. Proper treatment helps reduce nutrient loads and protect aquatic life in the river and the Baltic Sea.

The Kozienice plant discharges into the Vistula River basin, which drains into the Baltic Sea via the Vistula Lagoon and the Gulf of Gdańsk. The Vistula is a major European river supporting diverse fish species and migratory birds. Nutrient removal at the plant is critical to prevent eutrophication in the Baltic Sea, a sensitive marine environment.