Sujan Dey,Mohammad Seraj Uddin* and Mohammed Abul Manchur

Department of Microbiology, University of Chittagong, Chittagong-4331, Bangladesh.


(Received: 15 July 2017; accepted: 01 September 2017)


Water quality of theKarnaphuli, the most important river located in the highly populated Chittagong region of Bangladesh, was assessed as a large population depend on the water for drinking, household, or recreational purposes.Several standard physicochemicaland microbiological parameterswere usedto determine the level of pollution.Themean values of the physicochemical parameters were significantly different from those of the WHO guideline values. The microbiological examination of the river waterasdetermined by measuring total coliform and total fecal coliformdemonstrated that the water is highly contaminated by pathogenic bacteria. Coliform and fecal coliform counts were also significantly higher than those of the standards recommended by WHO. Water quality indices (WQI) of the river water at different stations were calculated to determine the severity of pollution.The results indicate that the river is highly polluted by various chemical pollutants and pathogenic bacteria.Regular monitoring and immediate measures are required to reduce risks for public health and safety.


Karnaphuli, Bangladesh,Waterpollution, Physicochemical parameters, Bacteriological assessment, Water quality index.