ROWP Comuna Iara Wastewater Treatment Plant, Făgetu Ierii, Cluj County

ROWP Comuna Iara is a municipal wastewater treatment plant located in Făgetu Ierii, a village in Iara commune, Cluj County, Romania. The plant serves a population of 611 and is part of the local sanitation infrastructure managed by the commune. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent between 2,000 and 10,000. Although the plant serves fewer than 2,000 people, Romania's national regulations align with EU standards, ensuring adequate treatment for smaller communities. The designed capacity is 600 m³/day, with an average discharge volume of 33.61 m³/day, indicating significant spare capacity. The treated effluent is discharged into a local watercourse that eventually flows into the Arieș River, a tributary of the Mureș River, which drains into the Tisza River and ultimately the Danube River and the Black Sea. The plant plays a key role in protecting the Arieș River basin from untreated sewage, supporting aquatic life and downstream water quality.

The plant discharges into a small stream that feeds the Arieș River, a major tributary of the Mureș River. The Mureș River flows into the Tisza River, which joins the Danube and reaches the Black Sea. The Arieș River supports diverse aquatic ecosystems, including fish species such as brown trout and grayling, and is an important corridor for migratory birds. The plant's secondary treatment helps reduce organic pollution and nutrient loads, protecting these downstream environments.