Ilieva N.Metodiev V.2024-07-162024-07-162024-07-162024-07-162023-01-011314-79781314-7471SCOPUS_ID:85164610280https://rlib.uctm.edu/handle/123456789/1436The significance of atmospheric Particulate Matter (PM) size as a determining factor for their source is of utmost importance. The analysis of PM2.5/PM10 ratios serves as a crucial indicator for particle origin. This study utilizes data obtained from measurements of PM2.5 and PM10 concentrations at the “Kamenitsa” automatic measuring station, located in the Kamenitsa district of Plovdiv, Bulgaria. The data covers a period of 6 years. A statistical approach for identifying the source of particulate matter in the air has been investigated and implemented. The findings of the applied method indicate that during winter, the primary source of particles is anthropogenic in nature.enArticle