Brzoza Stadnicka Wastewater Treatment Plant, Brzóza Stadnicka, Poland

Brzoza Stadnicka wastewater treatment plant is located in the village of Brzóza Stadnicka, in the Podkarpackie Voivodeship of southeastern Poland. The facility serves a small population of 628 residents, reflecting its role in a rural community within the gmina of Żołynia. The plant provides secondary treatment, which is the standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent below 10,000. The designed capacity of 1691 m³/day indicates the plant's infrastructure is sized to handle peak flows, while the actual discharge volume of 89.54 m³/day suggests current loads are well below capacity. The treated effluent is discharged into local watercourses that eventually drain into the Wisłok River, a tributary of the San River, which flows into the Vistula River and ultimately the Baltic Sea. The plant's operation helps protect the local watershed and downstream aquatic ecosystems from untreated wastewater pollution.

The plant discharges into small streams that feed the Wisłok River, part of the Vistula basin draining to the Baltic Sea. The region's aquatic ecosystems support diverse freshwater species and are important for migratory fish. The secondary treatment reduces organic load and suspended solids, helping maintain water quality in the sensitive Carpathian foothills watershed.