DZIARNY Wastewater Treatment Plant, Dziarny, Poland

The DZIARNY wastewater treatment plant is located in Dziarny, within the warmińsko-mazurskie voivodeship of Poland. It serves a population equivalent of 90,104, classifying it as a large agglomeration under EU regulations. The plant is situated inland, away from the Baltic coast, and its operations are integral to the region's water management infrastructure. As a facility serving over 90,000 people, DZIARNY is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum, with tertiary treatment required if the receiving waters are designated as sensitive areas. The regulatory framework ensures compliance with European standards for wastewater treatment. The treated effluent from DZIARNY is discharged into local water bodies that ultimately drain into the Vistula River basin and then into the Baltic Sea. The plant plays a crucial role in protecting the region's aquatic ecosystems, including rivers and lakes in the Masurian Lake District, by reducing nutrient loads and preventing eutrophication in downstream waters.

The DZIARNY plant discharges into local watercourses that are part of the Vistula River basin, which flows into the Baltic Sea. The region includes sensitive freshwater ecosystems, such as lakes and rivers in the Masurian Lake District, which are vulnerable to nutrient pollution. Effective treatment at this plant helps mitigate eutrophication risks and supports biodiversity in these inland waters.