Arroio do Sal is a municipality in the state of Rio Grande do Sul, Brazil. It is about 30 km south of Torres and 30 km north of Capão da Canoa, th…Arroio do Sal is a municipality in the state of Rio Grande do Sul, Brazil. It is about 30 km south of Torres and 30 km north of Capão da Canoa, thus in about the northern half of the state's shoreline. It is 175 km from Porto Alegre, with which it is connected via BR 101 and BR 290.