Wola Żyrakowska Wastewater Treatment Plant, Kozłów, Podkarpackie, Poland

The Wola Żyrakowska wastewater treatment plant is located in Kozłów, within the gmina Dębica, powiat dębicki, in the Podkarpackie Voivodeship of Poland. This facility serves a population of 3,329, placing it in the small agglomeration category under Polish and EU regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for inland freshwater discharges from agglomerations of this size. The designed capacity of 8,380 m³/day indicates the plant's infrastructure is sized to handle peak flows, while the actual discharge volume of 474.66 m³/day suggests current loading is well below capacity. The treated effluent is discharged into local watercourses that drain into the Wisłoka River, a tributary of the Vistula River, which ultimately flows into the Baltic Sea. The plant plays a key role in protecting the region's surface water quality and supporting the ecological health of the Vistula basin.

The plant's discharge enters small streams that feed the Wisłoka River, a right-bank tributary of the Vistula. The Vistula River flows north through Poland into the Baltic Sea via the Gdańsk Bay. The Wisłoka catchment supports diverse aquatic habitats and is important for migratory fish species. Secondary treatment helps reduce organic pollution and nutrient loads, protecting downstream water quality in this ecologically sensitive region.