In recent years, the new environment pollution has become very serious in many cities, including atmospheric, particularly urban road dust through re-suspension into the atmosphere, which not only affects the environmental system but is also having a negative impact on human health. The article presents the results of  a study of contaminants in road dust of different functional areas of Guiyang, the data indicated that the concentration of all analyzed heavy metals except for As were evidently higher than background values of Guizhou. In attempt to identifying the source of metals through correlation coefficient analysis and principal component analysis, the source analyses implied that As mainly derived from local soil and Ni existed the mixed sources of natural and anthropogenic, Hg, Cd, Cr, Cu and Zn were affected by industrial activities and vehicle emissions, while Pb largely originated from construction source and outside regional of Guiyang. Potential ecological risk index indicated that all of the study areas demonstrated “considerable category” risk index. Road dust increased along with city growth and it dynamics, the obtained results can serve as a theoretical source for urban environmental quality monitoring and management.

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