Overview
PEDRAJAS DE SAN ESTEBAN wastewater treatment plant serves Olmedo, Valladolid, in Castilla y León, Spain. It treats wastewater from a population of approximately 9,344 under EU regulatory standards.
PEDRAJAS DE SAN ESTEBAN is a wastewater treatment plant located in Olmedo, Valladolid, within the autonomous community of Castilla y León, Spain. The facility serves a population of around 9,344 people, classifying it as a small to medium agglomeration under EU classification. As a Spanish plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwater. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant's treated effluent is discharged into local watercourses that ultimately drain into the Duero River basin, which flows westward through Portugal to the Atlantic Ocean. The Duero basin supports diverse aquatic ecosystems and is important for regional agriculture and biodiversity.
Environmental context
The plant discharges into the Duero River basin, which flows through Castilla y León and into Portugal before reaching the Atlantic Ocean. This watershed supports a variety of aquatic life, including endemic fish species, and is used for irrigation and drinking water supply downstream. The ecological health of the Duero basin depends on effective wastewater treatment to prevent nutrient enrichment and pollution.
Frequently asked questions
The plant is located in Olmedo, Valladolid, in the autonomous community of Castilla y León, Spain.
The plant serves approximately 9,344 people, classifying it as a small to medium agglomeration under EU definitions.
The treated effluent is discharged into local watercourses that are part of the Duero River basin, which flows to the Atlantic Ocean.
As a Spanish plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size.
Under the EU UWWTD, plants serving 9,000 PE are required to have at least secondary treatment. If discharging into sensitive areas, tertiary treatment may be required.
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