Antuã () is a Portuguese river, located in the Aveiro region. It is the most important tributary of the

Ria de Aveiro The Aveiro lagoon (''Ria de Aveiro'') is a lagoon in Portugal. It is located on the Atlantic coast of Portugal, south of the municipality of Espinho and north of Mira (to the north of the Cape Mondego). Its average area covers approximately . It ...

after the

Vouga River Vouga River () is a river in the Centro Region of Portugal. The source of the Vouga is the Chafariz da Lapa, at an elevation of , in the parish of Quintela, municipality of Sernancelhe, Viseu District. The course of the river ends in the Atlanti ...

. Its name is linked to the former name of Estarreja: Antuão or Anterão. It has its source between

Romariz Romariz is a Portuguese parish, located in the municipality of Santa Maria da Feira Santa Maria da Feira () is a city and a municipality in Aveiro District in Portugal, 23 km from central Porto. The population in 2011 was 139,309,

and Fajões, near S. João da Madeira, and it ends west of Estarreja, on the waters of the Ria de Aveiro. The main towns near its banks are S. João da Madeira, Oliveira de Azeméis, and Estarreja. Its main tributary is the Ínsua. It has a total length of about . In 2008, an assessment was completed on the

river basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the ...

for water pollution. There was a recorded disruption of its freshwater system due to microplastics in water and sediments.

References

Rivers of Portugal {{Portugal-river-stub