Ciezkowice Wastewater Treatment Plant, Przysietnica, Poland

The Ciezkowice wastewater treatment plant is located in Przysietnica, within the gmina Stary Sącz in the małopolskie voivodeship of southern Poland. It serves a population of approximately 2,986, classifying it as a small agglomeration under Polish and EU regulations. The plant provides secondary treatment, which is the minimum required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The designed capacity of 6,600 m³/day is significantly higher than the current discharge volume of 425.76 m³/day, indicating ample reserve capacity for future growth. The treated effluent is discharged into local watercourses that eventually drain into the Dunajec River, a tributary of the Vistula River, which flows into the Baltic Sea. The plant plays a key role in protecting the water quality of the Dunajec basin, which supports diverse aquatic life and is used for recreation and agriculture.

The plant discharges into small streams that feed the Dunajec River, a major tributary of the Vistula. The Vistula flows northward through Poland into the Baltic Sea. The Dunajec basin is ecologically sensitive, supporting diverse fish populations and riparian habitats. The plant's secondary treatment helps reduce nutrient and organic loads, mitigating eutrophication risks in downstream waters.