Gminna Oczyszczalnia Sciekow w Bliznem - Secondary Wastewater Treatment in Podkarpackie

Gminna Oczyszczalnia Sciekow w Bliznem is a municipal wastewater treatment plant located in Blizne, a village in the Podkarpackie Voivodeship of southeastern Poland. The plant serves a population of 1,516 and operates with secondary treatment, which is the standard biological treatment required for small agglomerations under Polish and EU regulations. The plant has a designed capacity of 7,600 m³/day, with an actual discharge volume of 216.16 m³/day, indicating it operates well below its capacity. As a secondary treatment facility, it removes organic matter and suspended solids, meeting the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations under 10,000 population equivalent. The treated effluent is discharged into local streams that are part of the Wisłok River basin, which flows into the San River and eventually the Vistula River, the longest river in Poland. The plant plays a key role in protecting the water quality of these rivers and the downstream Baltic Sea ecosystem.

The plant discharges into the Wisłok River catchment, a tributary of the San River, which flows into the Vistula River and ultimately the Baltic Sea. The region is characterized by forested hills and agricultural land, and the local watershed supports diverse aquatic life, including fish species such as brown trout and grayling. The plant's secondary treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in the Baltic Sea.