Trzemeszno Wastewater Treatment Plant, Wielkopolskie, Poland

The Trzemeszno wastewater treatment plant is located in the town of Trzemeszno, within the Wielkopolskie region of Poland. It serves a population of approximately 3,500 residents, making it a small-scale municipal facility. The plant is situated inland, away from coastal areas, and its operations are part of the local water management infrastructure. The plant provides secondary treatment, which is the standard level required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent between 2,000 and 10,000. The facility has a designed capacity of 1,310 m³/day and currently treats an average daily flow of 494.63 m³/day, indicating operational headroom. As a Polish facility, it operates under national regulations that transpose EU directives, overseen by regional water authorities. The treated effluent is discharged into a local watercourse, which eventually drains into the Warta River basin and ultimately flows into the Oder River and the Baltic Sea. The plant plays a key role in protecting local surface water quality and supporting the ecological health of the downstream aquatic environment.

The plant discharges into a local stream that is part of the Warta River catchment, which flows into the Oder River and then the Baltic Sea. The region's watershed supports diverse freshwater habitats and is important for migratory fish species. The treatment plant helps reduce nutrient and organic pollutant loads, contributing to the ecological balance of the downstream water bodies.