In this study, the concentrations of arsenic and boron were determined in the water and the sediment, as well as in the muscle tissues of Squalius cephalus, Alburnoides bipunctatus, Barbus plebejus and Capoeta tinca from Emet Stream. The fish samples were caught in May 2011 and September 2012. The metal concentrations in the water samples were as follows: arsenic was 137.1-1002 A mu g L-1, and boron was 2421-14490 A mu g L-1. The metal concentrations in the sediment samples were as follows: arsenic was 14.51-3317.1 mg kg(-1), and boron was 14.22-1014.01 mg kg(-1). The mean tissue concentration of arsenic was lower than the TFC and WHO limits. Boron has been identified in fish tissues at concentrations between 0.26 and 2.96 mg kg(-1). The bioaccumulation in the muscle tissues of all fish species caught from Emet Stream did not exceed the limit values.