Río Andalgalá is a mountain torrent river located in the Andalgalá department of Catamarca Province, in northwestern Argentina. It drains a basin of approximately 211 square kilometers situated to the northwest of the city of San Fernando del Valle de Catamarca. The river operates as a permanent-flow stream, meaning it maintains year-round flow rather than running dry seasonally — a characteristic that distinguishes it from many ephemeral drainages in the arid Andean foothills of this region. The watershed sits within a geologically complex zone of the Andes where metal sulfide mineral deposits are present, which has significant implications for water chemistry and the overall aquatic environment.