MILLARES Wastewater Treatment Plant, Millares, Comunitat Valenciana, Spain

MILLARES is a wastewater treatment plant located in the industrial area of Millares, within the La Canal de Navarrés comarca of Valencia province, Spain. The facility serves a population of approximately 1,215 residents and is designed to handle up to 2,000 cubic meters of wastewater per day, with an average discharge volume of 209.52 m³/day. As a secondary treatment plant, MILLARES employs biological processes to reduce organic matter and suspended solids, meeting the standards required under Spanish regulations that transpose the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (under 2,000 population equivalent), the directive requires appropriate treatment, and secondary treatment is typical for plants serving communities of this scale in Spain. The treated effluent is discharged into the local water environment, contributing to the protection of the Júcar River basin, which ultimately drains into the Mediterranean Sea. The plant plays a key role in safeguarding water quality in the region, supporting both ecological health and downstream uses such as agriculture and recreation.

The plant discharges into the Júcar River basin, which flows eastward through the Comunitat Valenciana and empties into the Mediterranean Sea near Cullera. The Júcar is an ecologically important river supporting diverse aquatic life and irrigating extensive agricultural areas. The treatment plant helps reduce nutrient and organic pollution, protecting downstream ecosystems and the coastal marine environment from eutrophication risks.