OSK POLUDNIE Wastewater Treatment Plant, Piekary Śląskie, Silesian Voivodeship

OSK POLUDNIE is a wastewater treatment plant located in the Dąbrówka Wielka district of Piekary Śląskie, in the Silesian Voivodeship of southern Poland. The plant serves a population of around 7,174 residents within the Górnośląsko-Zagłębiowska Metropolia, a major urban-industrial region. As a small-scale municipal facility, it plays a key role in managing local wastewater from this part of the metropolitan area. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent (PE) between 2,000 and 10,000 are required to provide secondary treatment. Poland has transposed this directive into national law, and plants of this scale are typically equipped with biological treatment stages to meet effluent quality standards. The plant's treatment process and capacity are consistent with these regulatory expectations for small communities. The treated effluent from OSK POLUDNIE is discharged into local watercourses that ultimately drain into the Brynica River, a tributary of the Przemsza River, which flows into the Vistula River and then to the Baltic Sea. The plant's operations help protect the water quality of these rivers and the downstream aquatic ecosystems, including the sensitive Baltic Sea environment.

The plant discharges into the Brynica River catchment, part of the Vistula River basin that drains into the Baltic Sea. This region supports diverse aquatic life and is important for migratory fish species. The Baltic Sea is a semi-enclosed sea with eutrophication challenges, making nutrient removal from wastewater critical for downstream environmental health.