Study of PM10 and PM2.5 emissions in urban conditions

A study was made of the concentration of PM10 and PM2.5 emitted in a medium-sized city in Bulgaria. The relationship between PM10 and PM2.5 was established for the different seasons of the year. Data processing was done with the program product Origin. The analyzed data are presented with the average hourly emission values for a period of one year. The results show the trend of change based on the Pearson test. The applied methodology for evaluating the pollution based on the average hourly value of the emissions shows what the PM2.5 and PM10 pollution are in the city of Ruse. When considering pollution by the hourly average value, PM2.5 pollution shows much higher values than PM10.