B Wastewater Treatment Plant, Dęba, Poland - Secondary Treatment Facility

B wastewater treatment plant is located in Dęba, within the Łódź Voivodeship of central Poland. The facility serves a population of 4,120 and operates under secondary treatment standards, which is the baseline requirement for municipal wastewater in the European Union under the Urban Waste Water Treatment Directive (91/271/EEC). The plant has a designed capacity of 8,000 m³/day and currently treats an average daily flow of 587.45 m³/day, indicating significant reserve capacity. As a secondary treatment plant, it employs biological processes to reduce organic matter and suspended solids before discharge. The treated effluent is released into local watercourses that ultimately drain into the Vistula River basin, which flows northward to the Baltic Sea. The plant plays a key role in protecting the region's surface water quality and supporting the ecological health of downstream aquatic habitats.

The plant discharges into local streams that are part of the Vistula River basin, Poland's largest river system. The Vistula flows into the Baltic Sea, a semi-enclosed sea with sensitive ecosystems. Secondary treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in the Baltic, a major environmental concern for the region.