HONTORIA DEL PINAR Wastewater Treatment Plant, Hontoria del Pinar, Castilla y León

HONTORIA DEL PINAR is a wastewater treatment plant located in Hontoria del Pinar, a municipality in the province of Burgos, Castilla y León, Spain. The plant serves a population of approximately 2,600 residents and operates under Spain's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the standard biological treatment required for agglomerations of this size under the directive. With a designed capacity of 2,635 cubic meters per day and an average discharge volume of 409 cubic meters per day, the facility operates well within its capacity, indicating efficient management of local wastewater flows. The treated effluent is discharged into the local watershed, which ultimately drains into the Duero River basin. The Duero River flows westward through Spain and Portugal before reaching the Atlantic Ocean. The plant plays a key role in protecting the region's water quality and supporting the ecological health of the Duero basin.

The plant discharges into the Duero River basin, which flows through Castilla y León and into Portugal, emptying into the Atlantic Ocean near Porto. The Duero basin supports diverse aquatic ecosystems and is an important agricultural and ecological corridor. Secondary treatment helps reduce organic pollutants and protect downstream water quality.