ROWP Sag Wastewater Treatment Plant, Sârbi, Sălaj County, Romania

ROWP Sag is a municipal wastewater treatment plant located in Sârbi, Sălaj County, Romania. The facility serves a small population of 450 residents, reflecting its role in a rural community. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants before discharge. The plant operates under Romania's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which sets standards for wastewater treatment based on agglomeration size. For small agglomerations like this, secondary treatment is the required minimum. The designed capacity of 1134 m³/day indicates the plant is sized for a larger population than currently served, suggesting potential for future growth or seasonal variations. The treated effluent from ROWP Sag is discharged into local watercourses that ultimately drain into the Tisza River basin, a major tributary of the Danube. The plant's operation helps protect the ecological health of these water bodies by reducing nutrient and organic loads, supporting aquatic life and downstream water quality.

ROWP Sag discharges into local streams that flow into the Crasna River, a tributary of the Tisza River, which eventually reaches the Danube River and the Black Sea. The surrounding area is part of the Carpathian Basin, characterized by agricultural land and small settlements. The plant's secondary treatment reduces organic pollution and nutrients, helping to prevent eutrophication in downstream waters and supporting biodiversity in the region's aquatic ecosystems.