|Native name||Rio Açuã|
|River system||Mucuim River|
The river flows through the Mapinguari National Park, a 1,776,914 hectares (4,390,850 acres) conservation unit created in 2008. To the north of the national park it is crossed by the Trans-Amazonian Highway (BR-230), then runs through the Balata-Tufari National Forest, where it joins the Mucuim.
- Unidade de Conservação: Parque Nacional Mapinguari (in Portuguese), MMA: Ministério do Meio Ambiente, retrieved 2016-06-02
- Flona de Balata-Tufari Mapa Interativo (in Portuguese), ICMBio, retrieved 2016-06-03
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