NAVALPERAL DE PINARES Wastewater Treatment Plant, Ávila, Castilla y León

The NAVALPERAL DE PINARES wastewater treatment plant is located in the municipality of Navalperal de Pinares, within the province of Ávila in the autonomous community of Castilla y León, Spain. The plant serves a population of approximately 4,500 residents, classifying it as a small agglomeration under EU classification. The facility provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The plant has a designed capacity of 5,200 cubic meters per day and currently treats an average daily flow of about 822 cubic meters, indicating ample reserve capacity. The treated effluent is discharged into the local hydrological network, which ultimately drains into the Adaja River, a tributary of the Duero River. The Duero basin supports diverse aquatic life and is an important water resource for agriculture and ecosystems in the region. The plant's operation helps protect the water quality of the Adaja and Duero rivers.

The plant discharges into a small stream that flows into the Adaja River, which is part of the Duero River basin. The Duero River flows westward through Spain and into Portugal, emptying into the Atlantic Ocean at Porto. The watershed supports a variety of fish species, including barbel and trout, and is used for irrigation and drinking water supply. The secondary treatment provided by the plant helps reduce organic pollution and nutrient loads, protecting the ecological health of the downstream water bodies.