Dabrowa Tarnowska Wastewater Treatment Plant, Strzelce Wielkie, Poland

The Dabrowa Tarnowska wastewater treatment plant is located in Strzelce Wielkie, a village in the Lesser Poland Voivodeship (województwo małopolskie). It serves a population of approximately 13,898, classifying it as a medium-sized agglomeration under EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the regional wastewater infrastructure managed by local authorities. As a Polish facility, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations with a population equivalent between 2,000 and 15,000. For this scale, the directive requires compliance with effluent quality standards for biochemical oxygen demand, chemical oxygen demand, and suspended solids. The plant's design and operational practices are expected to meet these standards to protect receiving water bodies. The treated effluent from the plant is discharged into local watercourses that ultimately drain into the Vistula River basin, which flows northward to the Baltic Sea. The plant plays a crucial role in safeguarding the region's water quality, supporting aquatic ecosystems, and preventing nutrient pollution in downstream environments. Its operation contributes to the ecological health of the Vistula catchment area.

The plant discharges into local streams that are part of the Vistula River basin, the largest river system in Poland. The Vistula flows into the Baltic Sea, a semi-enclosed sea sensitive to eutrophication from nutrient loads. The treatment plant helps reduce organic and nutrient pollution, protecting downstream aquatic habitats and supporting biodiversity in the river and coastal zone.