This paper summarizes the monthly and seasonal variations of physico-chemical parameters and their influences on
phyto- plankton community of headwater stream Baldi with an explo- ration statistical data output. Upper stretch of head water stream was less polluted with high diversity of phytoplankton. However, the S2 (middle stretch) was influenced by maximum disturbances reflected in terms of high values of TDS, turbidity and nutrients (nitrates and phosphates), low DO concentration and minimum density of phytoplankton. A considerable recov- ery in the water quality and density of phytoplankton in lower stretch (S3) has been recorded