Siedliska Wastewater Treatment Plant, województwo podkarpackie, Poland

The Siedliska wastewater treatment plant is located in the village of Siedliska, within gmina Nozdrzec, powiat brzozowski, województwo podkarpackie, Poland. It serves a small population of 28 residents, reflecting its role in a rural community. The plant is part of Poland's municipal wastewater infrastructure, which operates under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the minimum standard required by the EU directive for inland freshwater discharges from agglomerations of this scale. With a designed capacity of 160 m³/day and an actual discharge volume of 3.99 m³/day, the plant operates well below its capacity, indicating it is sized for future growth or seasonal peaks. The treated effluent is discharged into local watercourses that ultimately drain into the San River basin, a tributary of the Vistula River, which flows into the Baltic Sea. The plant's operation helps protect the local watershed and downstream aquatic ecosystems from untreated sewage pollution.

The Siedliska plant discharges into small streams that feed the San River, a major tributary of the Vistula River. The Vistula flows northward through Poland and empties into the Baltic Sea via the Gulf of Gdańsk. The local watershed supports diverse aquatic life and is part of a region with significant ecological value, including habitats for fish and migratory birds. Proper wastewater treatment is essential to maintain water quality in this sensitive riverine environment.