Iwanowice Dworskie Wastewater Treatment Plant - Poland | Secondary Treatment

The Iwanowice Dworskie wastewater treatment plant is located in the village of Iwanowice Dworskie, within gmina Iwanowice, powiat krakowski, in the małopolskie region of southern Poland. The plant serves a population of approximately 6,137, classifying it as a small to medium agglomeration under Polish and EU regulations. The facility provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size discharging into freshwater. The plant has a designed capacity of 7,970 m³/day and currently treats an average daily flow of 875.04 m³/day, indicating significant reserve capacity. The treated effluent is discharged into local watercourses that ultimately drain into the Vistula River basin, which flows northward to the Baltic Sea. The plant plays a key role in protecting the region's surface waters from nutrient pollution and supporting the ecological health of the Vistula catchment.

The plant discharges into small streams within the Vistula River basin, which flows through southern and central Poland before reaching the Baltic Sea. The region is characterized by agricultural land use and scattered settlements, making nutrient removal important to prevent eutrophication in downstream waters. The Vistula estuary supports diverse aquatic life and is an important migratory corridor for fish species.