Objective: The environmental stress such as climatic conditions, anthropogenic activities on river water quality and its flow is of challenging interest. In the present study, evaluation of the surface water (in Cooum river, India) quality and the seasonal impact have been investigated. Methodology: Hydrogeochemical facies such as piper plots, chloroalkali indices, kelly index, sodium absorption ratio, magnesium hazard and rock water interaction have been considered to understand the ionic constituents, geochemistry of the river water and its influence on water quality. The water samples were collected seasonally during March, 2013-2014 and are categorized as pre-monsoon, monsoon and post-monsoon. Results: The investigation results reveal that the ionic concentration and organic loads exhibits for all three seasons indicating the anthropogenic activities. Conclusion: The rock water interaction shows that plagioklase weathering is mainly dominant in the sampling sites and the ionic constituents were due to seawater intrusion and gypsum dissolution in the water. © 2016 A. Dhamodharan et al.