The Poșaga is a small river in the Apuseni Mountains, Alba County, western Romania. It is a left tributary of the river Arieș. It flows through the municipality Poșaga, and joins the Arieș near the village Poșaga de Jos.Posga / Valea Posaga (jud. Alba), e-calauza.ro It is fed by several smaller streams, including Incești, Săgagea and Belioara. Its length is and its basin size is .
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