Overview
Viana do Castelo cidade wastewater treatment plant serves 41,600 people in Viana do Castelo, Portugal. Located near the Atlantic coast, it operates under the EU Urban Waste Water Treatment Directive.
Viana do Castelo cidade is a wastewater treatment plant serving the city of Viana do Castelo in northern Portugal. The plant is situated near the Ecovia Litoral Norte in the Areosa parish and treats wastewater from a population of approximately 41,600 people, classifying it as a medium-sized agglomeration under EU standards. As a Portuguese facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the discharge enters sensitive areas, such as coastal waters or estuaries. The plant discharges treated wastewater into the Atlantic Ocean via the nearby coast, as it lies within 50 km of the shoreline. The receiving waters support diverse marine life and are part of the broader Iberian coastal ecosystem. Proper treatment is essential to protect water quality and comply with EU environmental standards for coastal zones.
Environmental context
The plant discharges into the Atlantic Ocean along the northern Portuguese coast, which ultimately connects to the broader North Atlantic ecosystem. This coastal area supports diverse marine life, including fish, crustaceans, and migratory seabirds. The region's watershed includes the Lima River estuary nearby, which is ecologically sensitive and important for local biodiversity. Effective wastewater treatment helps prevent nutrient pollution and protects coastal water quality.
Frequently asked questions
The plant is located in the Areosa parish of Viana do Castelo, Portugal, along the Ecovia Litoral Norte, with coordinates 41.706 N, -8.860 W.
The plant serves approximately 41,600 people, classifying it as a medium-sized agglomeration under EU classification.
The plant discharges treated wastewater into the Atlantic Ocean, as it is located within 50 km of the coast. The discharge point likely enters coastal waters near the Lima River estuary.
As a Portuguese plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations over 15,000 population equivalent, and potentially tertiary treatment if discharging into sensitive coastal areas.
Under the EU UWWTD, plants serving over 15,000 PE must provide at least secondary treatment (biological treatment). For coastal discharges, additional nutrient removal may be required to protect marine environments.
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