Kotla Wastewater Treatment Plant, Lower Silesia, Poland

The Kotla wastewater treatment plant is located in the village of Kotla, within gmina Kotla, powiat głogowski, in the Lower Silesian Voivodeship (województwo dolnośląskie) of Poland. It serves a population of approximately 1,942, classifying it as a small agglomeration under Polish and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 2,550 m³/day and an actual discharge volume of 276.90 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Oder River basin, which flows northward to the Baltic Sea. The plant plays a key role in protecting local streams and groundwater from untreated sewage, supporting the ecological health of the region's aquatic ecosystems.

The plant discharges into small watercourses within the Oder River basin, which flows through western Poland and empties into the Szczecin Lagoon and then the Baltic Sea. The region's watershed supports diverse aquatic life and is important for migratory fish species. Protecting water quality in this basin helps maintain the ecological balance of the Baltic Sea coastal zone.