Oczyszczalnia Ziemowit Wastewater Treatment Plant, Lędziny, Silesia, Poland

Oczyszczalnia Ziemowit is a wastewater treatment plant located in Lędziny, within the Silesian Voivodeship of southern Poland. The facility serves a population of approximately 15,727, placing it in the medium agglomeration category under EU classification. It is situated inland, away from the Baltic Sea coast, and its operations are part of the regional water management infrastructure in the Upper Silesian metropolitan area. As a Polish plant serving a population between 10,000 and 100,000, Oczyszczalnia Ziemowit is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive requires secondary treatment (biological treatment) for discharges to freshwater and estuaries from agglomerations of this size. The plant's treatment process and capacity details are not publicly available, but the regulatory framework ensures that appropriate treatment standards are met to protect receiving waters. The treated effluent from Oczyszczalnia Ziemowit likely discharges into a local river or stream within the Vistula River basin, which ultimately flows into the Baltic Sea. The plant plays a key role in protecting the region's water quality, supporting aquatic ecosystems, and safeguarding downstream communities and environments from pollution.

The plant is located in the Upper Silesian region, part of the Vistula River basin. Treated wastewater likely enters a local tributary of the Vistula, which flows northward through Poland and discharges into the Baltic Sea via the Vistula Lagoon. The region's industrial history and dense population make effective wastewater treatment critical for maintaining water quality in the Vistula and its tributaries, which support diverse aquatic life and are used for recreation and drinking water supply downstream.