Temporal variations of PM2.5 in the ambient air of a suburban site in Athens, Greece

The daily average PM2.5 concentration reached 21.1 μg m-3 and all measurements were below U.S. Environmental Pollution Agency daily limit (65 μg m-3). A regression analysis was used to investigate the relationship among PM2.5 concentrations and meteorological parameters. Additionally, PM2.5 mass concentrations were correlated with other inorganic gaseous pollutants (O3, NO, NO2, SO2) while weekly and seasonal PM2.5 variations were also investigated.