Krzywcza Wastewater Treatment Plant - Secondary Treatment in Podkarpackie, Poland

The Krzywcza wastewater treatment plant is located in the village of Krzywcza, within the gmina Krzywcza in powiat przemyski, województwo podkarpackie, Poland. This small-scale facility serves a population of 507, reflecting its role in a rural community. The plant is situated inland, far from coastal areas, and its operations are part of the local water management infrastructure. As a secondary treatment plant, Krzywcza provides biological treatment to remove organic matter and suspended solids. The plant's designed capacity is 3000 m³/day, with an actual discharge volume of 72.29 m³/day, indicating significant spare capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent (PE) below 2000 are not required to have collecting systems unless necessary, but this plant meets secondary treatment standards. The treated effluent is discharged into a local watercourse, which eventually drains into the San River, a tributary of the Vistula River. The Vistula flows into the Baltic Sea, making this plant part of the broader Baltic Sea catchment. The plant's operation helps protect downstream aquatic ecosystems from nutrient pollution and organic loading.

The Krzywcza plant discharges into a local stream that feeds into the San River, a major tributary of the Vistula River. The Vistula ultimately flows into the Baltic Sea, a semi-enclosed sea sensitive to eutrophication from nutrient inputs. The plant's secondary treatment reduces organic pollutants and nutrients, supporting the ecological health of the San and Vistula rivers. The surrounding region includes agricultural areas and forests, where maintaining water quality is important for biodiversity and human use.