Sanok Wastewater Treatment Plant - Międzybrodzie, Podkarpackie, Poland

The Sanok wastewater treatment plant is located in Międzybrodzie, within the Sanok commune in Podkarpackie Voivodeship, southeastern Poland. It serves a population equivalent of 96,827, classifying it as a large agglomeration under EU regulations. The plant is situated inland, away from the Baltic coast, and discharges into the local river system. As a large agglomeration in Poland, the plant is required to meet secondary treatment standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). For sensitive areas, which are common in the region, tertiary treatment with nutrient removal may be mandated. The plant's design and operational details align with Polish national regulations implementing the directive. The treated effluent likely flows into the San River, a tributary of the Vistula River, which ultimately drains into the Baltic Sea. The San River supports diverse aquatic life and is an important ecological corridor in the Carpathian region. The plant's performance is critical for maintaining water quality in this sensitive watershed.

The plant discharges into the San River basin, a major tributary of the Vistula River, which flows northward to the Baltic Sea. The San River supports diverse aquatic ecosystems, including fish species such as salmon and trout, and provides habitat for migratory birds. The region's Carpathian foothills contribute to high water quality sensitivity, necessitating effective nutrient removal to prevent eutrophication downstream.