摘要 : The most common construction material used in Taiwan is concrete, potentially contaminated by geologic heavymetals (HMs). Younger children spend much time indoors, increasing HM exposure risks from household dustowing to their beh... 展开 The most common construction material used in Taiwan is concrete, potentially contaminated by geologic heavymetals (HMs). Younger children spend much time indoors, increasing HM exposure risks from household dustowing to their behaviors. We evaluated arsenic (As), cadmium (Cd), and lead (Pb) concentrations in fingernailsamong 280 preschoolers between 2017 and 2023. We also analyzed HM concentrations, including As, Cd, Pb,chromium (Cr), nickel (Ni), copper (Cu), zinc (Zn), iron (Fe), and manganese (Mn), in 90 household dust and 50road dust samples from a residential area where children lived between 2019 and 2021 to deepen the understandingof sources and health risks of exposure to HMs from household dust. The average As, Cd, and Pbconcentrations in fingernails were 0.12 ± 0.06, 0.05 ± 0.05, and 0.95 ± 0.77 μg/g, respectively. Soil parentmaterials, indoor construction activities, vehicle emissions, and mixed indoor combustion were the pollutionsources of HMs in household dust. Higher Cr and Pb levels in household dust may pose non-carcinogenic risks topreschoolers. Addressing indoor construction and soil parent materials sources is vital for children’s health. Thefinding of the present survey can be used for indoor environmental management to reduce the risks of HMexposure and avoid potential adverse health effects for younger children. 收起