The study area of savitri river district of Raigad in Maharashtra state was estimate of zooplankton abundance and impact of natural calamities and behaviors, function and size of zooplankton. The judgement of quality of water from May 2018 to April 2019. The qualitative and quantitative evaluation of the variation in river water showed high quality of zooplankton population throughout the study period. Rotifers formed dominated group over other group of organism. The present study revealed that the water of River. Savitri is contaminated of sewage and various chemical industrial effluents at stations A and B Savitri river at Raigad.