Chodecz Wastewater Treatment Plant, Mielno | Poland

The Chodecz wastewater treatment plant is located in Mielno, within the gmina Chodecz in województwo kujawsko-pomorskie, Poland. It serves a population of approximately 3,005, classifying it as a small 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 provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity is 5,135 cubic meters per day, and the current discharge volume is 428.47 cubic meters per day, indicating a utilization rate well below capacity. This suggests the plant has room for future growth or seasonal variations. The treated effluent is discharged into local water bodies that ultimately drain into the Vistula River basin, which flows into the Baltic Sea. The plant plays a key role in protecting the region's water quality, supporting aquatic life in the downstream rivers and contributing to the ecological health of the Baltic Sea.

The plant discharges into local streams that are part of the Vistula River basin, the largest river system in Poland. The Vistula flows northward into the Baltic Sea, a semi-enclosed sea with sensitive ecosystems. The secondary treatment provided by the plant helps reduce nutrient loads, mitigating eutrophication risks in the Baltic. The surrounding area is primarily agricultural, so the plant's effluent management is important for maintaining water quality in local rivers and groundwater.