ROWP SC APAVIL SA Nicolae Balcescu Wastewater Treatment Plant, Stoilești, Romania

ROWP SC APAVIL SA Nicolae Balcescu is a wastewater treatment plant located in Stoilești, Vâlcea County, Romania. It serves a small population of 250 people, reflecting its role in a rural community. The plant is operated as part of the municipal wastewater infrastructure in the region. The plant provides secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity of 1250 m³/day indicates the plant's ability to handle peak flows, though current discharge volume is 10.52 m³/day, suggesting low utilization relative to capacity. The treated effluent is discharged into local watercourses that eventually drain into the Olt River basin, a major tributary of the Danube. The Danube then flows into the Black Sea, making the plant's performance relevant to downstream water quality in the Danube Delta and Black Sea coastal ecosystems.

The plant discharges into the Olt River basin, which flows into the Danube River and ultimately the Black Sea. The Olt River supports diverse aquatic life and is an important migratory corridor for fish species. The Black Sea is a semi-enclosed sea with sensitive ecosystems, including coastal wetlands and marine habitats, that benefit from effective nutrient removal in upstream treatment plants.