• Heavy metal concentration in river water, sediment, periphyton and fish muscle were analysed during the study. Among the heavy metal concentration Copper was found highest (0.039 mg/l) in water at Fraserganj during 2018-2019 and same observation was also reported in next period (2019-2020). However, the other metal concentrations like Zinc, Manganese, Lead and Cadmium in river water were found within safe limit.
• The average concentration of Copper found highest (34.95 mg/kg) at Bhagalpur (Bihar). As per International Joint Commission (1982), US EPA (2002) safe limit of heavy metal in sediment the Copper concentration at Bhagalpur showing the moderately polluted area. The average concentration of Chromium found highest (54.104 mg/kg) at Fraserganj (West Bengal). As per International Joint Commission (1982), US EPA (2002) safe limit of heavy metal in sediment, the Chromium concentration at Fraserganj showing the moderately polluted area.
• The heavy metal in periphytic algae were found at different stretch of river within safe limits.
• The concentration of heavy metals in fish flesh like rita, M. cavassius, P. conchonius, X. cancila, O. rubicundus found within safe limits and other 14 fish species were analysed below detection limit.