The investigation makes it quite evident that Cd, Fe, and Mn are somewhat contaminated at the Langtang-North Big and Small Dams. According to the study's findings, the Big Dam, which supplies the Langtang North Water Board with water for the purification of all Langtang-North settlers, should be avoided because the water's quality is only moderately affected by Cd, Fe, and Mn, with Fe having the highest concentration of these heavy metals (albeit still below WHO standards).