Haczow Wastewater Treatment Plant, Haczów, Podkarpackie, Poland

The Haczow wastewater treatment plant is located in the village of Haczów, within the gmina Haczów in powiat brzozowski, województwo podkarpackie, Poland. It serves a population of approximately 6,009 people, making it a small to medium agglomeration under Polish and EU classification. The plant provides primary treatment, which involves physical processes such as sedimentation to remove settleable solids. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations of this size (between 2,000 and 10,000 population equivalent) are generally required to have secondary treatment, unless the receiving waters are less sensitive. The plant's designed capacity is 4,500 m³/day, and it currently discharges 856.79 m³/day of treated wastewater. The treated effluent is discharged into a local watercourse, which ultimately drains into the Wisłok River, a tributary of the San River, and then into the Vistula River before reaching the Baltic Sea. The plant plays a role in protecting the local watershed from untreated wastewater, supporting water quality in the region's rivers and downstream ecosystems.

The plant discharges into a local stream that flows into the Wisłok River, part of the Vistula basin. The Wisłok eventually joins the San River, which is a major tributary of the Vistula, Poland's longest river, emptying into the Baltic Sea. The downstream environment includes diverse aquatic habitats that support fish and other wildlife. The region's water quality is influenced by agricultural runoff and rural settlements, making effective wastewater treatment important for maintaining ecological balance.