Debangshu Banerjee¹, Soumendranath Chatterjee², Susanta Nath^3,

Water is one of the wonders of nature and the main constituent to create life on earth. Water that is useful for human use should have an optimum physicochemical constitutional regime. This study was done by critical analysis of different results obtained from recent studies on different physicochemical parameters of freshwater bodies. This study is also related to plankton and human interferences on different physicochemical parameters. However, due to recent urbanization, and an explosion in population together with industrial growth, these values are often not at the acceptable range. Human activities are affecting water quality both qualitatively and quantitatively. Industrial and domestic wastes discharge into the river; water from crop fields laden with pesticides, vitiate the pond and lake waters. Prevention of diseases of human is also dependent on the quality of the aquatic ecosystem. Therefore, it is essential to have in depth information about the water quality parameters and regular monitoring of important water bodies is also a necessity. Major factors like temperature, hardness, pH, nitrate, chloride, DO, BOD, TDS, alkalinity, etc. have a profound impact on aquatic biota. Abiotic factors influence the biotic conditions including the life of plankton in the aquatic ecosystem. This article provides a brief knowledge of the current scenario of the water quality of the freshwater ecosystems.

freshwater, physicochemical parameters, plankton, pollution