Jozefow Wastewater Treatment Plant, Czerniawka, Podkarpackie, Poland

The Jozefow wastewater treatment plant is located in Czerniawka, a village in the gmina of Laszki, within the powiat jarosławski of the Podkarpackie Voivodeship in southeastern Poland. This facility serves a small population of 1,247 residents, reflecting its role in a rural community. The plant is situated inland, far from the Baltic coast, and its operations are part of Poland's municipal wastewater infrastructure. As a secondary treatment plant, Jozefow meets the standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive mandates secondary treatment for all discharges from agglomerations with a population equivalent (PE) between 2,000 and 10,000, which aligns with the plant's serving capacity. The plant's designed capacity of 2,000 m³/day and actual discharge volume of 177.80 m³/day indicate it operates well below its maximum capacity. The treated effluent from Jozefow is discharged into a local watercourse that ultimately drains into the San River, a tributary of the Vistula River, which flows into the Baltic Sea. The plant plays a crucial role in protecting the local watershed from untreated sewage, supporting aquatic life and water quality in the downstream environment. Its operation contributes to the ecological health of the San River basin, an important region for biodiversity in southeastern Poland.

The Jozefow plant discharges into a local stream that feeds into the San River, a major tributary of the Vistula River. The Vistula flows northward through Poland and empties into the Baltic Sea via the Gulf of Gdańsk. The San River basin supports diverse aquatic ecosystems, including fish species such as salmon and trout, and provides habitat for migratory birds. The plant's secondary treatment helps reduce nutrient loads, protecting downstream water quality in this ecologically sensitive region.