ROWP Suncuius Wastewater Treatment Plant, Șuncuiuș, Bihor, Romania

ROWP Suncuius is a municipal wastewater treatment plant located in Șuncuiuș, a commune in Bihor County, Romania. The plant serves a population of approximately 1,400 residents, providing secondary treatment to meet national and EU regulatory standards for wastewater discharge. The plant operates with a designed capacity of 1,200 m³/day and currently processes an average daily volume of 160.27 m³, indicating significant spare capacity. As a secondary treatment facility, it employs biological processes to reduce organic matter and suspended solids, in line with the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The treated effluent is discharged into local watercourses that eventually drain into the Crișul Repede River, a tributary of the Körös River system, which flows into the Tisza River and ultimately the Danube River and Black Sea. The plant plays a key role in protecting the local aquatic environment and downstream ecosystems from untreated wastewater pollution.

The plant discharges into the Crișul Repede River basin, which flows through western Romania and into Hungary. The Crișul Repede supports diverse aquatic life and is part of the larger Tisza River catchment, which drains into the Danube and Black Sea. The region's karst landscape and groundwater resources require careful management of nutrient and pollutant loads to prevent eutrophication and protect drinking water sources.