Overview
Oczyszczalnia Miejska in Siemiatycze, Podlaskie Voivodeship, Poland, serves approximately 63,209 people. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
Oczyszczalnia Miejska is a municipal wastewater treatment plant located in Siemiatycze, a town in the Podlaskie Voivodeship of northeastern Poland. The plant serves an estimated population of 63,209, placing it in the medium-to-large agglomeration category under EU classification. As a Polish facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent (PE) between 10,000 and 150,000. For larger agglomerations or discharges to sensitive areas, tertiary treatment may be mandated. The regulatory framework ensures compliance with EU standards for effluent quality. The treated wastewater is discharged into the local watershed, which ultimately drains into the Bug River, a major tributary of the Narew River and part of the Vistula basin. The Bug River supports diverse aquatic life and is an important ecological corridor in the region. The plant plays a key role in protecting the water quality of this river system from nutrient and pollutant loads associated with urban wastewater.
Environmental context
The plant discharges into the local watershed, which flows into the Bug River, a significant watercourse in eastern Poland. The Bug River eventually joins the Narew River, a tributary of the Vistula, which drains into the Baltic Sea. The region's aquatic ecosystems support diverse species, including fish and macroinvertebrates, and the plant's operations help mitigate eutrophication risks in downstream waters.
Frequently asked questions
Oczyszczalnia Miejska is located in Siemiatycze, in the Podlaskie Voivodeship of northeastern Poland, near the border with Belarus.
The plant serves approximately 63,209 people, classifying it as a medium-to-large agglomeration under EU standards.
The treated wastewater is discharged into the local watershed, which flows into the Bug River, a major tributary of the Narew River and part of the Vistula basin.
As a Polish plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size and may mandate tertiary treatment if discharging to sensitive areas.
Under the EU UWWTD, plants serving between 10,000 and 150,000 PE are required to have secondary treatment. Many Polish plants also incorporate nutrient removal to meet requirements for discharges to sensitive areas like the Baltic Sea catchment.
Nearby plants