Evaluation of seasonal changes in physicochemical and bacteriological parameters of Gomti River in Bangladesh

This study was undertaken to investigate the current pollution status of the Gomti River in Bangladesh by collecting water samples from twenty sites along the 120 km stretch of the Gomti River during the rainy (June 2019) and dry (January 2020) seasons. The collected samples were examined for their physicochemical parameters (pH, EC, TDS, TOC, and turbidity), heavy metals, namely chromium (Cr), copper (Cu), iron (Fe), nickel (Ni), lead (Pb), and zinc (Zn), and bacteriological parameters (aerobic heterotrophic bacteria and total coliforms). All the physicochemical parameters obtained were within the recommended guidelines set by the World Health Organization (WHO, 2011). Among the metals, Fe, Ni, and Zn were found to be higher than the recommended guideline values in the dry season. A significant (p