Otorowo Wastewater Treatment Plant – Advanced Treatment in Wielkopolskie, Poland

The Otorowo wastewater treatment plant is located in the village of Otorowo, within Szamotuły county, województwo wielkopolskie, Poland. It serves a population of approximately 2,500 residents, making it a small-scale municipal facility. The plant is situated inland, away from coastal areas, and its operations are part of the regional wastewater infrastructure in western Poland. The plant provides advanced treatment, which goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 2,300 m³/day and an average daily discharge of 357 m³, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The advanced treatment level ensures high-quality effluent suitable for discharge into local water bodies. The treated wastewater is discharged into the local watershed, which ultimately drains into the Warta River basin and then to the Oder River, flowing into the Baltic Sea. The plant plays a key role in protecting the region's surface waters from nutrient pollution, supporting aquatic life and downstream ecosystems. Its advanced treatment helps meet Poland's obligations under the EU Water Framework Directive.

The plant discharges into the Warta River catchment, part of the Oder River basin that flows into the Baltic Sea. This region supports diverse aquatic habitats and is important for migratory fish species. Advanced treatment reduces nutrient loads, helping to prevent eutrophication in downstream waters and the Baltic Sea.