Mewa Wastewater Treatment Plant, Pomiechówek | Poland

Mewa is a municipal wastewater treatment plant located in Pomiechówek, in the Mazowieckie Voivodeship of Poland. It serves a population of approximately 3,605 people, classifying it as a small agglomeration under Polish regulations. The plant is situated inland, away from coastal areas, and operates as part of the local water management infrastructure. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size in non-sensitive areas. It has a designed capacity of 7,800 m³/day and currently discharges an average of 514 m³/day of treated wastewater. The plant's capacity utilization is low, indicating ample reserve for future growth or seasonal variations. The treated effluent is discharged into a local watercourse, which ultimately drains into the Vistula River basin. The Vistula flows northward through Poland into the Baltic Sea, making the plant's operations important for protecting downstream aquatic ecosystems. Proper secondary treatment ensures that organic pollutants and suspended solids are reduced, supporting water quality in the region.

The plant discharges into a tributary of the Vistula River, which flows through central Poland and empties into the Baltic Sea via the Gdańsk Bay. The Vistula basin supports diverse aquatic life and is an important migratory corridor for fish species. The plant's secondary treatment helps reduce nutrient loads, mitigating eutrophication risks in the Baltic Sea, a sensitive marine environment.