Background: Today, air pollution is one of the major problems in large cities including
Isfahan.
Methods: The objective of this study was to investigate the variations of ozone (O3),
carbon monoxide (CO), nitric oxide (NO), nitrogen dioxide (NO2), nitrogen oxides (NOx),
sulphur dioxide (SO2), and particulate matter (PM10) concentrations in different months
at three stations and also to explore the correlations between pollutants. Monthly
averages of air pollutant concentrations recorded in three pollution monitoring stations
(Bozorgmehr, Azadi, and Laleh) were obtained in 2008 and 2009.
Results: There were significant monthly variations in the concentrations of air quality
parameters. Results showed that there was a correlation between ozone and particle
matter (p<0.05), and between nitric oxide and nitrogen oxides (p<0.01). The statistical
analysis indicated that there were significant differences in the O3, NO, NOx and PM10
concentrations.
Conclusion: The air quality monitoring data collected in city center of Isfahan showed
seasonal variations for O3, CO, NO, NO2, NOx, SO2, and PM10.