Water Quality Rating of Waterbodies in and around Kolkata Metropolis

Kolkata’s wetlands not only provide breathing oxygen or keep the surrounding environment cool, apart from these wetlands also provide fish by which the fishing community sustains its livelihood by fish farming in the wetlands. But the serious polluting substances cause a decrease of water quality in Kolkata wetlands principally by human interference. Kolkata waterbodies are polluted mainly by the inorganic and organic solid wastes, toxic chemicals, organic compounds etc. which are generally found in the wastewater coming from the domestic discharges. Surface water samples from the different waterbodies in and around Kolkata metropolis were collected for the analysis of physico-chemical parameters. The analytical results show the extreme deterioration of water quality of the waterbodies which are even unusable for outdoor bathing.