The Longjing area is located at the Taichung, in central Taiwan. And it also near the Taichung Thermal Power Plant (TTPP) and Taichung Harbor Kwan-Lien Park (THKLP). Thus, this study measured the ambient air particulates and metallic elements concentrations using total suspended particulates (TSP) at Long Cyuan Elementary School (LCYES), Lung Ching Elementary School (LCHES), and Long Shan Primary School (LSPS) sampling sites at Longjing area. Because of the unique characteristic locations, therefore, this study focused on monitor ambient air particles and metallic element [Hg(p) Mn, Fe, Zn, Cr, Cu, and Pb] concentrations, particles and metallic element dry deposition around the Longjing area. In addition, method of back trajectory analysis was used to find the pollutants parcels in this study. Moreover, Principal Component Analysis (PCA) method was also applied in the identifying the possible sources of the ambient air pollutants at Longjing area. The results indicated that the LCYES has the lowest pollutants concentrations when compared with LCHES and LSPS sampling sites. The major pollutants sources were come from China especially in January. These pollutants will come to Taiwan along with dust storm accompaning exhausted gas from TTPP and THKLP. And the highest particulates bound mercury were in January. Moreover, PCA results also show that the factor loading values >0.7 frequency for metallic elements Mn, Fe, Zn and Hg(p) were greater than the other metallic elements. Thus, we concluded that the major pollutants were mainly from vehicles emissions, transport emissions and steel factory at THKLP and TTPP sampling site. Potential significant health impacts and concern at the Longjing sampling site are needed for this study.
