Emow Wastewater Treatment Plant, Łęg, Poland | Advanced Treatment Facility

Emow is a wastewater treatment plant located in Łęg, within the gmina Konstancin-Jeziorna in województwo mazowieckie, Poland. The plant serves a population of 2,086 and discharges an average of 297.43 cubic meters of treated wastewater per day. Its designed capacity is 11,680 m³/day, indicating it operates well below capacity. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. This level of treatment typically includes nutrient removal to protect sensitive water bodies. As a Polish facility, it operates under national regulations that transpose EU directives, ensuring compliance with stringent effluent standards. The treated effluent from Emow is discharged into the local watershed, which ultimately drains into the Vistula River basin. The Vistula flows northward through Poland into the Baltic Sea. The advanced treatment helps protect downstream aquatic ecosystems and supports the ecological health of the Vistula and the Baltic Sea coastal zone.

The plant discharges into the Vistula River basin, which is the largest river system in Poland and flows into the Baltic Sea. The Vistula supports diverse aquatic life and provides important migratory corridors for fish species. The advanced treatment at Emow reduces nutrient loads, helping to mitigate eutrophication in the Baltic Sea, a sensitive marine environment.