Urinary cadmium (UCd) is an indicator of the long term exposure of human health. The objective of this research was to study
UCd of people aged between 9 to 12 and 13 to 15 years old in both sexes in Prathadpadeang, in Mae Tao and Mae Ku. 849 urines
were collected, and determined by using the ICP-MS. The results revealed that 64.30% had UCd less than 1μg/gCr. XUCd in 3
Sub-districts were 0.132