Table 2.

Summary statistics of air pollutants and heavy metals by case.

Air Pollutants and Heavy Metals	Mean	Median
PM10 (μg/m3)	45.35 ± 11.07	45.07 (36.67–52.68)
PM2.5 (μg/m3)	25.83 ± 6.17	25.33 (21.36–29.71)
SO2 (ppm))	0.005 ± 0.001	0.005 (0.004–0.005)
NO2 (ppm)	0.023 ± 0.007	0.023 (0.018–0.028)
O3 (ppm)	0.028 ± 0.010	0.028 (0.020–0.035)
CO (ppm)	0.493 ± 0.110	0.468 (0.412–0.575)
Pb (μg/m3)	0.024 ± 0.012	0.022 (0.015–0.033)
Cd (μg/m3)	0.001 ± 0.001	0.001 (0.001–0.001)
Cr (μg/m3)	0.005 ± 0.004	0.004 (0.002–0.006)
Cu (μg/m3)	0.025 ± 0.018	0.021 (0.013–0.034)
Mn (μg/m3)	0.032 ± 0.017	0.029 (0.020–0.040)
Fe (μg/m3)	0.672 ± 0.345	0.650 (0.429–0.838)
Ni (μg/m3)	0.005 ± 0.003	0.004 (0.003–0.006)
As (μg/m3)	0.004 ± 0.003	0.003 (0.002–0.005)

Data are presented as the mean ± standard deviation and median (25–75%).