The Chișer is a small river in Arad County, Romania. Formerly a left tributary of the river Crișul Alb, it now discharges into the Canalul Morilor, which flows parallel to the south of the Crișul Alb.Planul de management al riscului la inundații - Administrația Bazinală de Apă Crișuri, p. 15 Its length is and its basin size is . The former lower course of the Chișer is now the Valea Nouă Chișer.
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