Zolkow Wastewater Treatment Plant, Łuszczanów, Greater Poland

The Zolkow wastewater treatment plant is located in Łuszczanów, a village in the Jarocin County of the Greater Poland Voivodeship, Poland. It serves a population of approximately 6,328 people, 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 facility 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. The designed capacity is 8,500 m³/day, and the current discharge volume is 902.27 m³/day, indicating significant spare capacity. As a Polish plant, it operates under the national Water Law Act and is subject to permits issued by the Regional Water Management Board (RZGW). The treated effluent is discharged into a local watercourse, which ultimately drains into the Warta River basin, a major tributary of the Oder River. The Oder flows into the Baltic Sea via the Szczecin Lagoon. The plant's advanced treatment helps protect the downstream aquatic environment, including sensitive ecosystems in the Warta and Oder catchments, by reducing nutrient loads and organic pollutants.

The plant discharges into a local watercourse that feeds into the Warta River basin, part of the larger Oder River system. The Oder River flows into the Baltic Sea through the Szczecin Lagoon, a ecologically important area that supports diverse aquatic life and serves as a migratory corridor for fish. The advanced treatment at Zolkow helps minimize nutrient and pollutant loads, contributing to the health of these downstream waters.