Studies were conducted to determine the occurrence and abundance of Blue-Greens in relation to physico-chemical characteristics of Konandur pond in Thirthahalli taluk, Karnataka. A total of 14 species of Blue-Greens belonging to 10 genera were recorded of which Gleocapsa consists of 3 species followed by Nostoc and Oscillatoria with 2 species. The physico-chemical parameters were analyzed as per standard methods. The study revealed that, pond water was not much polluted. In the light of standard of water quality recommended by BIS, the pond water should be used for human consumption and cooking after proper treatment.