BAJO NALON Wastewater Treatment Plant, Soto del Barco, Asturias, Spain

BAJO NALON is a wastewater treatment plant located in Soto del Barco, within the Asturias region of northern Spain. The facility serves a population equivalent of 27,102, classifying it as a medium-sized agglomeration under EU regulations. Its location near the Cantabrian Sea places it in a coastal zone, which influences its discharge requirements. As a Spanish plant, BAJO NALON operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. For coastal discharges, the directive may require additional treatment to protect sensitive marine environments. The plant's designed capacity is 1.00 (units unspecified), indicating a baseline operational scale. The treated effluent likely discharges into the Nalón River or directly into the Cantabrian Sea, given the plant's proximity to the coast. The Nalón River is the longest river in Asturias, supporting diverse aquatic life and flowing into the Bay of Biscay. The plant plays a key role in protecting local water quality and the marine ecosystem of the Cantabrian coast.

BAJO NALON is situated in the Nalón River basin, which drains into the Cantabrian Sea (Bay of Biscay). The river supports salmonid populations and other freshwater species, while the coastal area is ecologically sensitive due to its role as a migratory corridor for marine life. The plant's discharge must meet stringent standards to prevent eutrophication and protect the region's biodiversity.