Overview
Lomianki wastewater treatment plant serves the Warsaw metropolitan area in Mazowieckie, Poland. It treats wastewater from approximately 76,000 people under EU regulatory standards.
The Lomianki wastewater treatment plant is located in the Dziwożony area of Warsaw, within the Mazowieckie voivodeship of Poland. It serves a population of approximately 76,244, placing it in the medium-to-large agglomeration category under EU classification. The plant is part of the regional wastewater infrastructure supporting the Warsaw metropolitan area. 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. For plants serving between 10,000 and 150,000 population equivalent, the directive mandates secondary treatment as a minimum, with tertiary treatment required if the receiving waters are designated as sensitive areas. The plant's treatment processes are designed to meet these standards. The treated effluent is discharged into the local watershed, which ultimately drains into the Vistula River basin. The Vistula flows northward through Poland into the Baltic Sea. The plant plays a key role in protecting the Vistula River and the Baltic Sea from nutrient pollution, supporting aquatic life and downstream ecosystems.
Environmental context
The Lomianki plant discharges into the Vistula River basin, which flows through central Poland and empties into the Baltic Sea via the Gulf of Gdańsk. The Vistula is Poland's longest river and supports diverse aquatic habitats, including important fish spawning grounds. Nutrient removal at the plant helps reduce eutrophication risks in the Baltic Sea, a semi-enclosed sea sensitive to nitrogen and phosphorus loading.
Frequently asked questions
The Lomianki wastewater treatment plant is located in the Dziwożony area of Warsaw, in the Mazowieckie voivodeship of Poland.
The plant serves approximately 76,244 people, classifying it as a medium-to-large agglomeration under EU definitions.
Treated wastewater from the Lomianki plant is discharged into the local watershed, which drains into the Vistula River basin and ultimately reaches the Baltic Sea.
The plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size and may require tertiary treatment in sensitive areas.
Under the EU UWWTD, plants serving over 10,000 population equivalent are required to have at least secondary treatment. Many Polish plants in this category also incorporate nutrient removal to protect the Baltic Sea.
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