Oczyszczalnia scieków - Koźmin Wielkopolski Wastewater Treatment Plant | Poland

Oczyszczalnia scieków is a municipal wastewater treatment plant located in Koźmin Wielkopolski, a town in the Greater Poland Voivodeship of Poland. The plant serves a population of around 3,148, classifying it as a small agglomeration under Polish and EU regulations. It operates with secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive for discharges into freshwater systems. The plant has a designed capacity of 9,583 m³/day and currently discharges an average of 448.86 m³/day of treated effluent. As a secondary treatment facility, it removes organic matter and suspended solids, meeting the effluent quality standards set by Polish law and the EU directive. The plant's operational context aligns with national requirements for small communities, ensuring environmental protection. The treated wastewater is discharged into local watercourses that eventually drain into the Oder River basin, which flows into the Baltic Sea. The plant plays a key role in protecting the region's surface waters from pollution, supporting aquatic life and downstream ecosystems. Its location inland reduces direct marine impact, but its contribution to the Oder basin is significant for regional water quality.

The plant discharges into local streams that are part of the Oder River basin, which flows northward through Poland and Germany before emptying into the Baltic Sea. The Oder basin supports diverse aquatic habitats and is an important ecological corridor for migratory fish. The plant's secondary treatment helps reduce nutrient loads, mitigating eutrophication risks in downstream waters and the Baltic Sea.