ROWP ECO AQUA Calarasi sector Lehliu Gara - Secondary Wastewater Treatment in Lehliu-Gară, Romania

ROWP ECO AQUA Calarasi sector Lehliu Gara is a municipal wastewater treatment plant located in Lehliu-Gară, Călărași County, Romania. The plant serves a population of approximately 2,633 residents and operates with a designed capacity of 5,000 m³/day, treating an average daily volume of 209.36 m³. As a secondary treatment facility, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant operates under Romania's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent (PE) between 2,000 and 10,000. For smaller agglomerations like Lehliu-Gară, secondary treatment is the standard requirement, ensuring compliance with European environmental standards. The facility's capacity utilization of approximately 4.2% indicates significant reserve capacity for future growth. The treated effluent is discharged into local surface waters within the Danube River basin. The plant plays a crucial role in protecting downstream water quality in the Călărași region, preventing untreated wastewater from entering the ecosystem. Its operation supports the ecological health of the Danube Delta, a vital wetland area that supports diverse aquatic life and migratory bird populations.

The plant discharges into the Danube River basin, which flows into the Danube Delta and ultimately the Black Sea. The Danube Delta is a major European ecological corridor supporting diverse aquatic species and migratory birds. Secondary treatment reduces organic load and nutrients, helping to prevent eutrophication in downstream waters. The plant's inland location, over 50 km from the coast, means its discharge has a cumulative impact on the river system rather than direct marine effects.