Pollution Status of Balu River due to Industrial Input at Dhaka, Bangladesh

Physical parameters of the water are the main properties indicating the status of water quality. Major physical parameters to evaluate water quality were Electrical Conductivity (EC), pH, Dissolve Oxygen (DO), Biological Oxygen Demand (BOD), Total Dissolve Solids (TDS) and Turbidity. This study reveals variations of water quality of Balu River at Dhaka, Bangladesh during rainy and winter seasons between February’ 2008 to June’ 2008. The samples were collected from ten different sports at two different depth of water (surface and 5m depth). In dry period, the highest average values of EC, Turbidity, DO, BOD and TDS were 715.1 μS/cm, 18.87 NTU, 1.04 mg/l, 8.06 mg/l and 87.3 mg/l respectively. While in rainy period, the highest average values of EC, Turbidity, DO, BOD and TDS were 118.6 μS/cm, 11.13 NTU, 2.77 mg/l, 6.56 mg/l and 69.81 mg/l respectively. The river was found unsuitable for drinking, domestic, irrigation and industrial purposes. Poor river water quality impacts the ecosystem and aesthetic features very negatively.