ROWP Primaria Criva Wastewater Treatment Plant, Vârvor, Dolj County

ROWP Primaria Criva is a wastewater treatment plant located in Vârvor, a locality within the commune of Vârvoru de Jos, Dolj County, Romania. The plant serves a small population of 88 residents, reflecting its role in a rural setting. It operates under Romania's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which sets standards for collecting and treating wastewater from small agglomerations. The plant provides advanced treatment, which goes beyond the secondary treatment typically required for small communities under EU regulations. Advanced treatment often includes nutrient removal to protect sensitive water bodies. The plant has a designed capacity of 600 m³/day and currently treats a discharge volume of 44.06 m³/day, indicating it operates well below its capacity. The treated effluent from the plant is discharged into local watercourses that eventually drain into the Danube River basin. The Danube flows eastward into the Black Sea, a semi-enclosed sea with significant ecological importance. The advanced treatment helps reduce nutrient loads, which is crucial for preventing eutrophication in downstream waters and supporting aquatic biodiversity in the Danube Delta and Black Sea.

The plant discharges into local streams that are part of the Jiu River sub-basin, a tributary of the Danube. The Danube River flows into the Black Sea, a large marine ecosystem sensitive to nutrient pollution. Advanced treatment at this plant helps minimize the risk of eutrophication in downstream waters, supporting the ecological health of the Danube Delta and the Black Sea's coastal zone.