Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 47 8 2018 08 01 1137 1144 Eray YURTSEVEN Public Health Department, Cerrahpasa Faculty of Medicine, Istanbul University, 34320 Kocamustafa Pasa, Istanbul, Turkey Suphi VEHİD Public Health Department, Cerrahpasa Faculty of Medicine, Istanbul University, 34320 Kocamustafa Pasa, Istanbul, Turkey Merve BOSAT Health Management Department, Faculty of Health Sciences, Istanbul Kemerburgaz University, 34320 Sisli, Istanbul, Turkey Selçuk KÖKSAL Public Health Department, Cerrahpasa Faculty of Medicine, Istanbul University, 34320 Kocamustafa Pasa, Istanbul, Turkey Cemile Nihal YURTSEVEN Dept. of Sports Management, Faculty of Sport Sciences, Istanbul University, 34320 Avcılar, Istanbul, Turkey 2018 08 01 2018 08 01 Background: We investigated the air quality changes from 2003-2013 in Istanbul, Turkey. Methods: We studied SO2, CO and PM concentration patterns in 10 districts of Istanbul. The data was obtained from air pollution monitoring stations of Istanbul Metropolitan Municipality Environmental Protection Department. We compared the variations of mean concentrations monthly, yearly and seasonally. The winter season was accepted from Oct to Mar and the summer season from Apr to Sep. Results: The highest monthly average values for all measurements of sulfur dioxide and CO were 12.61, 949.19 µg/m3 in Sarachane respectively. The Highest value of the monthly average of the Particulate Matter was 72.07 µg/m3 in Kartal district. During the period between 2003-2013, monthly mean concentration values of different districts differed significantly in levels of SO2 (P=0.012), CO (P=0.029), and PM (P=0.024). Conclusion: The emissions of air pollutants (SO2, PM, and CO) decreased considerably from 2003 to 2013.     https://ijph.tums.ac.ir/index.php/ijph/article/view/14290 https://ijph.tums.ac.ir/index.php/ijph/article/download/14290/6081