SIGoeEIRO Wastewater Treatment Plant, Sigüeiro, Galicia, Spain

SIGoeEIRO is a wastewater treatment plant located in Sigüeiro, a parish in the municipality of Oroso, within the province of A Coruña, Galicia, Spain. The plant serves a population of approximately 7,457 people, placing it in the small agglomeration category under EU classification. As a Spanish facility, SIGoeEIRO operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (under 10,000 population equivalent), the directive requires appropriate treatment, typically secondary treatment, to protect receiving waters. The treated effluent from SIGoeEIRO likely discharges into a local watercourse within the Tambre River basin, which flows into the Atlantic Ocean near the Ría de Muros e Noia. The region's Atlantic climate and proximity to ecologically sensitive coastal waters necessitate effective treatment to protect downstream aquatic habitats and the ria ecosystem.

SIGoeEIRO's treated wastewater likely enters a tributary of the Tambre River, which flows into the Ría de Muros e Noia, a coastal inlet on the Atlantic Ocean. This ria supports diverse marine life and is an important area for migratory birds and fisheries. The plant's location in the Tambre basin means its discharge affects downstream water quality in both freshwater and estuarine environments.