In tropical estuaries, there is a dearth of data on the diversity and quantity of bacterial species that may be used as pollution indicators. This is a problem since these estuaries are considered to be particularly sensitive to pollution. In order to accomplish this, we examined the levels of a large number of indicators of pollution that are currently present, as well as the types, numbers, and seasonal shifts of human pathogenic bacteria that are present all along the south eastern coast of India. In addition, we looked at how these factors change over time. In 2019 and 2020, samples were collected from the estuary sections of the rivers in order to get information about conditions before, during, and after the monsoons. The variety and number of microorganisms in near-shore environments may be diminished as a result of discharges from terrestrial drainages, wastewater spillways from residential areas, and other sources.