Chungcheongnam-do has various emission sources, including large-scale facilities such as power plants, steel and petrochemical industry complexes, which can lead to the severe PM pollution. Here, we measured concentrations of PM10, PM2.5, and its metallic elements at a suburban site in Taean, Chungcheongnam-do from September 2017 to June 2022. During the measurement period, the average concentrations of PM10 and PM2.5 were 58.6 µg/m3 (9.6~379.0 µg/m3) and 35.0 µg/m3 (6.1~132.2 µg/m3), respectively. The concentration of PM10 and PM2.5 showed typical seasonal variation, with higher concentration in winter and lower concentration in summer. When high concentrations of PM2.5 occurred, particulary in winter, the fraction of Zn and Pb components considerably increased, indicating a significant contribution of Zn and Pb to high-PM2.5 concentration. In addition, Zn and Pb exhibited the highest correlation coefficient among all other metallic elements of PM2.5. A backward trajectory cluster analysis and CPF model were performed to examine the origin of PM2.5. The high concentration of PM2.5 was primarily influenced by emissions from industrial complexes located in the northeast and northwest areas.