ROWP SC CUP SA VRANCEA AG MARASESTI Wastewater Treatment Plant, Mărășești, Vrancea, Romania

ROWP SC CUP SA VRANCEA AG MARASESTI is a wastewater treatment plant located in Mărășești, Vrancea County, Romania. The plant serves a population of 468 and operates under the Romanian regulatory framework aligned with the EU Urban Waste Water Treatment Directive (91/271/EEC). As a small agglomeration, it is subject to requirements for appropriate treatment based on the sensitivity of the receiving environment. The plant provides primary treatment, which involves physical processes such as sedimentation to remove settleable solids. With a designed capacity of 18,700 m³/day and an actual discharge volume of 725.75 m³/day, the plant operates well below its capacity. The plant's scale and treatment level are consistent with facilities serving small communities in the region. The treated effluent is discharged into a local water body within the Siret River basin, which flows into the Danube River and ultimately reaches the Black Sea. The plant plays a role in protecting local water quality and the downstream aquatic ecosystem, supporting the ecological health of the Danube Delta and Black Sea coastal waters.

The plant discharges into a tributary of the Siret River, part of the Danube River basin. The Siret flows into the Danube, which empties into the Black Sea via the Danube Delta, a ecologically sensitive area supporting diverse aquatic life and important migratory bird populations. Primary treatment reduces suspended solids but may not remove nutrients, potentially contributing to eutrophication in downstream waters if not managed with additional measures.