ROWP Primaria Orasului MIERCUREA NIRAJ - Primary Wastewater Treatment Plant in Miercurea Nirajului, Romania

ROWP Primaria Orasului MIERCUREA NIRAJ is a wastewater treatment plant located in Dumitreștii, Miercurea Nirajului, Mureș County, Romania. The plant serves a population of 2,231 and has a designed capacity of 2,500 m³/day, with a discharge volume of 11.55 m³/day. It provides primary treatment, which involves physical processes like sedimentation to remove solids. As a small agglomeration in Romania, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires appropriate treatment for discharges into freshwater. For populations under 10,000, primary treatment may be acceptable if the receiving waters are not sensitive. The plant's discharge volume is well below its designed capacity, indicating potential for future growth. The treated effluent is discharged into local watercourses that eventually drain into the Mureș River, a major tributary of the Tisza River, which flows into the Danube and ultimately the Black Sea. The plant plays a role in protecting the local watershed from untreated sewage, supporting aquatic life and downstream water quality.

The plant discharges into local streams that feed into the Mureș River, part of the Tisza-Danube basin. This watershed supports diverse aquatic ecosystems and is important for regional biodiversity. The Mureș River flows through agricultural and urban areas before joining the Tisza, making nutrient and pollutant management critical for downstream water quality in the Danube and Black Sea.