The ecosystem received any pollutant, changes occur in its physico-chemical nature and that causes a change in the biota of that region. Some biota which is sensitive to the pollutant will disappear from the place and those capable of being tolerant to that type of pollution are able to withstand. In the identification of the organisms of different/similar type of ecosystem, we can predict the degree of pollution. To evaluate the water quality of Dravyavati River (Amanishah Nala) is the great advantages for showing the amount of pollutant present in the water and its impact on the physico-chemical and biological components of the water and it can to use to assess what the organisms are likely to be exposed to as well as for calculation of the amount of pollutant transported in and out of the system. This work represents an attempt to compile and evaluate the present status of affairs with regard to population Density and Diversity study of Algal sp. in different Season from Dravyavati, along with its nutrient status and phytoplankton.