LEKUMBERRI LARRAUN Wastewater Treatment Plant, Larraun, Navarra, Spain

LEKUMBERRI LARRAUN is a wastewater treatment plant located in Mugiro, within the municipality of Larraun, in the province of Navarra, Spain. The plant serves a population of approximately 2,274 residents, reflecting its role in managing domestic wastewater for this rural community in the Leitzaldea region. As a small-scale facility in Spain, the plant operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations with a population equivalent under 2,000, the directive requires appropriate treatment, while those above 2,000 typically need secondary treatment. Given the population served, the plant is expected to provide at least secondary treatment to meet regulatory standards. The treated effluent from the plant is discharged into the local hydrological network, which ultimately drains into the Ebro River basin. The Ebro River flows eastward into the Mediterranean Sea, supporting diverse aquatic ecosystems along its course. The plant's operation is crucial for protecting the water quality of local streams and the downstream environment.

The plant discharges into the Ebro River basin, which flows into the Mediterranean Sea. The receiving water bodies support aquatic life and are part of a region known for its biodiversity. Proper treatment helps prevent nutrient pollution and maintains ecological balance in the downstream watershed.