Wielopole Skrzynskie Wastewater Treatment Plant, Siedliska, Podkarpackie, Poland

Wielopole Skrzynskie wastewater treatment plant is located in Siedliska, within the gmina Lubenia of the Rzeszów district in Podkarpackie Voivodeship, Poland. The facility served the local community before its closure, operating as a secondary treatment plant with a designed capacity of 2010 cubic meters per day. As a secondary treatment plant, it would have met the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary biological treatment for agglomerations of this scale. The plant's closure may reflect changes in local infrastructure, such as connection to a larger regional system or decommissioning due to population shifts. The plant's discharge would have entered a local watercourse within the Wisłok River basin, which flows into the San River and ultimately the Vistula River, draining into the Baltic Sea. The region's aquatic ecosystems rely on well-treated effluent to maintain water quality and support biodiversity.

The plant is located inland in the Subcarpathian region, within the Wisłok River catchment. The Wisłok flows into the San River, a tributary of the Vistula, which discharges into the Baltic Sea. The area supports diverse aquatic life and is part of a broader ecological network that benefits from effective wastewater treatment to prevent nutrient pollution and protect downstream habitats.