Overview
BOS w Wisle Wielkiej is a secondary treatment plant serving nearly 5,000 people in Wisła Wielka, Poland. It discharges treated wastewater into local waterways within the Vistula basin.
BOS w Wisle Wielkiej is a municipal wastewater treatment plant located in Wisła Wielka, a village in the Silesian Voivodeship of southern Poland. The facility serves a population of approximately 4,979, classifying it as a small to medium agglomeration under Polish and EU regulations. The plant provides secondary biological treatment, meeting the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. It has a designed capacity of 6,000 m³/day and currently treats an average daily volume of about 710 m³, indicating ample reserve capacity. The treated effluent is discharged into local watercourses that ultimately drain into the Vistula River basin, which flows north to the Baltic Sea. The plant plays a key role in protecting the region's surface water quality and supporting the ecological health of the downstream aquatic environment.
Environmental context
The plant's discharge enters small streams in the Pszczyna area, which are part of the upper Vistula River catchment. The Vistula is Poland's largest river, flowing over 1,000 km to the Baltic Sea. This region supports diverse aquatic life, including fish species such as barbel and chub, and the plant's secondary treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in downstream waters.
Frequently asked questions
The plant is located in Wisła Wielka, a village in the gmina Pszczyna, powiat pszczyński, Silesian Voivodeship, southern Poland.
The plant serves approximately 4,979 people, classifying it as a small to medium agglomeration under EU classification.
The treated effluent is discharged into local watercourses that are part of the upper Vistula River basin, eventually reaching the Baltic Sea.
The plant provides secondary biological treatment, which is the standard required by the EU Urban Waste Water Treatment Directive for agglomerations of this size.
As a Polish plant serving fewer than 10,000 people, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for inland discharges. Compliance is overseen by Polish water authorities.
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