Leg Wastewater Treatment Plant, Łęg, Poland | Secondary Treatment Facility

The Leg wastewater treatment plant is located in Łęg, a village in the Świętokrzyskie Voivodeship of Poland. It serves a population of approximately 5,134 people, classifying it as a small to medium agglomeration under Polish and EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the regional water management infrastructure. Treatment at the Leg plant is secondary, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The plant has a designed capacity of 14,500 m³/day, with an actual discharge volume of 732 m³/day, indicating significant reserve capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent from the Leg plant is discharged into local watercourses, which ultimately drain into the Vistula River basin. The Vistula flows northward through Poland into the Baltic Sea. The plant's operations help protect the local watershed from untreated sewage, supporting aquatic life and downstream water quality in the region.

The Leg 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. The plant's secondary treatment reduces organic pollutants and nutrients, helping to mitigate eutrophication risks in downstream waters. The surrounding area is predominantly agricultural and rural, with the plant playing a key role in maintaining local water quality.