The present study was conducted to determine the current state of water quality parameters and concentration of metals in the water and fish of Balu River. Samples were collected from three sampling sites in both wet and dry seasons. Temperature, color and odor, pH, electrical conductivity (EC), total dissolved solids (TDS), total solids (TS), optical density, salinity, and dissolved oxygen (DO) of water were tracked. Five fish species (Puntius ticto, Channa punctatus, Glossogobius giuris, Amblypharyngodon mola, and Mystus vittatus) were tested for metal concentrations (Cu, Pb, Cd, Zn and Cr). During the dry season, the river's water was slightly black, light grey, and black in color, and it smelled strongly pungent. Waterborne life was fatally affected by the DO values. The TDS, EC, and TS of water were higher in the dry than in the wet season. The trends of metal concentrations were Zn > Cu > Pb > Cr > Cd in water and Zn > Cu, Pb > Cr > Cd in fish species. During the dry season, the Cu in G. giuris; Pb, Cr, and Zn in A. mola, and the Cd in C. punctatus were the highest among the fishes investigated. However, during the dry season, A. mola had the highest total metal bioaccumulation while P. ticto had the lowest. When opposed to the wet season, the water had a significantly worse quality during the dry season, which may have been brought on by nearby industrial pollutants.