Pleszew Wastewater Treatment Plant: Advanced Treatment in Wielkopolskie, Poland

The Pleszew wastewater treatment plant is located in Piaski, Pleszew, within the gmina Pleszew in województwo wielkopolskie, Poland. It serves a population of approximately 6,926, classifying it as a small to medium agglomeration under Polish and EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the regional water management infrastructure. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 28,050 m³/day and an actual discharge volume of 987.54 m³/day, the facility operates well below its capacity, indicating potential for future growth or seasonal variability. The advanced treatment level ensures high-quality effluent suitable for discharge into sensitive environments. The treated wastewater is discharged into local watercourses that ultimately drain into the Warta River basin, a major tributary of the Oder River, which flows into the Baltic Sea. The plant plays a key role in protecting the local watershed and downstream aquatic ecosystems from nutrient pollution and other contaminants, supporting biodiversity and water quality in the region.

The Pleszew plant discharges into the Warta River basin, which flows into the Oder River and eventually reaches the Baltic Sea. This watershed supports diverse aquatic life and is important for migratory fish species. The advanced treatment helps reduce nutrient loads, mitigating eutrophication risks in the Baltic Sea, a sensitive marine environment.