Oczyszczalnia sciekow w Otwocku - Wastewater Treatment Plant in Otwock, Poland

Oczyszczalnia sciekow w Otwocku is a municipal wastewater treatment plant located in Otwock, within the Mazowieckie voivodeship of Poland. The facility serves an estimated population of 81,185, classifying it as a medium-sized agglomeration under EU classification. The plant is situated in the central-eastern part of Poland, near the Swider River, a tributary of the Vistula. As a Polish facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. Poland's implementation of the directive through national regulations ensures that plants like this one meet effluent standards for biological oxygen demand, chemical oxygen demand, and suspended solids. The treatment process typically involves mechanical and biological stages to reduce pollutants before discharge. The treated wastewater is likely discharged into the Swider River, which flows into the Vistula River, Poland's longest river. The Vistula ultimately drains into the Baltic Sea via the Gulf of Gdansk. The plant plays a key role in protecting the Swider River's water quality, which supports diverse aquatic life and serves as a local ecological corridor. Its operation helps maintain the ecological health of the Vistula basin and the Baltic Sea catchment area.

The plant discharges into the Swider River, a right-bank tributary of the Vistula River. The Vistula flows northward through central Poland and empties into the Baltic Sea via the Gulf of Gdansk. The Swider River supports diverse aquatic habitats and is an important corridor for migratory fish species. The plant's treatment performance directly influences water quality in this sensitive river system, which is part of the larger Vistula basin, a major ecological region in Poland.