To grasp meltwater chemistry and geochemical processes influencing hydrogeochemistry, major ion chemistry of the glacial lake Satopanth Tal was carried out to provide relevant details on the dissolved ions sources, weathering, and hydrogeochemical processes as well as anthropogenic activities taking place throughout the lake setting. Twenty-one surficial water samples were collected and 12 different physicochemical parameters were analyzed to understand the hydrogeochemistry of the study area. The mean pH value was estimated to be 6.9 in the lake water, which indicates a marginally acidic. The ionic contribution through the organic matter decomposition has been indicated by the observation of dominancy of the total anions over the total cations. The most abundant anion was Cl− in Satopanth Tal, while Ca2+ and Mg2+ were significant cations in the water. The high ratios of (Ca2+ + Mg2+)/TZ+, (Ca2+ + Mg2+)/(Na+ + K+), HCO3̶/(Ca2+ + Mg2+), and the higher Ca+/ Na+, Mg+/ Na+ and HCO3̶/ Na+ ratio indicate the supremacy of the weathering of carbonate as a significant source of dissolved ions in the study area's lake water. The lower equivalent ratios of Na+/Cl− and K+/Cl− are measured and substantially comparable results are observed that have been expected from the Gibbs plot and the stable isotope analysis suggests a reasonably significant contribution to the chemical composition of the Satopanth Tal water by these ions from atmospheric precipitation. The correlation and factor analysis show that water chemistry at Satopanth Tal is primarily influenced by weathering processes such as weathering of carbonate and silicate, pyrite oxidation.