ROWP SC APAVIL SA Calimanesti Wastewater Treatment Plant, Călimănești, Romania

ROWP SC APAVIL SA Calimanesti is a municipal wastewater treatment plant located in Călimănești, Vâlcea County, Romania. The plant serves a population of approximately 6,615 people, placing it in the small agglomeration category under Romanian and EU regulations. As a plant in an EU member state, it operates under the Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwater. The regulatory framework ensures compliance with national and EU standards for effluent quality. The plant discharges treated wastewater into the Olt River, a major tributary of the Danube. The Olt River flows southward through the Carpathian Mountains and eventually joins the Danube, which drains into the Black Sea. The local watershed supports diverse aquatic life and is an important ecological corridor in the region.

The plant discharges into the Olt River, which flows through the Carpathian Mountains and joins the Danube River. The Danube then empties into the Black Sea. The Olt River basin supports diverse aquatic ecosystems and is an important migratory route for fish species. The plant's location in a mountainous region means the receiving waters are sensitive to nutrient pollution, which can impact downstream water quality.