Water is most important for life aquatic living depends on the physico-chemical characteristics of water like algae. Population and distribution of algae is greatly affected by physico- chemical properties of water. Present paper represents the physico-chemical and biological property of property of Dam water. Water samples were collected from restricted sites of Dholawad Dam from three different seasons and analyzed physico-chemical parameters in botany lab. Algal sample were collect to the surface of water and 50 liter water passed through standard plankton net collecting phytoplankton. The identification of phytoplankton was done with standard books and monographs. During the work over all 36 genera of phytoplankton were reported at the Dholawad Dam. 14 genera belonged to Chlorophyceae, 13 genera belonged to Bacillariophyceae and 9 genera from Cynophyceae. The algal population showed the abundance in winter and summer.