It is evident that agricultural techniques such manures, fertilizers, intensive animal husbandry, and pesticides, as well as natural sources like rocks, soils, geological settings, and climates, can produce heavy metals . The main industry of Langtang-North is agriculture, and the region is naturally composed of plateaus and rocks. Thus, it is reasonable to state that there is a chance that heavy metals will accumulate in the Langtang-North dams, which are utilized for home activities like fishing and irrigation.