Sw Barbary Wastewater Treatment Plant, Sompolno, Poland

Sw Barbary is a wastewater treatment plant located in Sompolno, within the Wielkopolskie Voivodeship of Poland. The facility serves a small population of 361 residents, reflecting its role in a rural or small-town setting. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant operates under Poland's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent (PE) between 2,000 and 15,000. Although Sw Barbary serves fewer than 2,000 people, it still meets secondary treatment standards, aligning with national requirements for smaller communities. The plant's designed capacity of 117.00 m³/day indicates its ability to handle peak flows, while the actual discharge volume of 51.47 m³/day suggests it operates below capacity. The treated effluent from Sw Barbary is discharged into local watercourses that eventually drain into the Warta River basin, a major tributary of the Oder River. This water body supports diverse aquatic life and is part of the larger Oder catchment, which flows into the Baltic Sea. The plant's location inland, away from the coast, reduces direct marine impact, but its discharge contributes to the overall water quality of the regional river system.

Sw Barbary discharges into local streams that are part of the Warta River basin, which flows into the Oder River and ultimately reaches the Baltic Sea. The Warta basin supports diverse aquatic ecosystems, including fish species such as pike and bream, and is an important migratory corridor for birds. The plant's secondary treatment helps protect these downstream environments from organic pollution and nutrient loading.