The Almada River basin is in the southern region of Bahia State, covering the municipalities of Almadina, Coaraci, Ibicaraí, Barro Preto, Itajuípe, Itabuna, Ilhéus and Uruçuca.

[1] The Almada River has a length of 138 kilometres (86 mi) from its source in the Serra do Chuchu in Almadina to its mouth at the Itaípe bar in Ilheus.

[2] The lower section of the river runs through the 157,745 hectares (389,800 acres) Lagoa Encantada e Rio Almada Environmental Protection Area (APA), created in 1993, where it drains the Lagoa Encantada.

[3] From Aritaguá the river flows south parallel to the sea shore past Iguape, and empties into the Atlantic Ocean near the town of Ilhéus.

In the summer of 2015–16 water rationing was imposed due to low levels in the river, which had dried up in some sections.