Table 3

Within-season average outdoor concentrations at homes and central-site monitor



Overall
Summer
Winter
Pollutant
Location
N
Mean (SD)
Median
N
Mean (SD)
Median
N
Mean (SD)
Median

PM2.5
Outdoor
59
13.9 (5.0)
12.5
35
15.1 (5.7)
13.8
24
12.2 (3.1)
13.8
     (μg/m3)
Central Site
59
15.4 (6.1)
14.6
35
17.0 (7.1)
14.9
24
13.1 (3.4)
12.9
EC
Outdoor
58
0.52 (0.41)
0.46
34
0.51 (0.51)
0.39
24
0.54 (0.18)
0.56
     (μg/m3)
Central Site
58
0.86 (0.34)
0.83
34
1.01 (0.31)
1.01
24
0.65 (0.27)
0.61
NO2
Outdoor
52
17.2 (6.0)
16.8
36
17.7 (6.4)
17.3
16
16.3 (4.9)
15.5
     (ppb)
Central Site
52
18.4 (3.9)
17.9
36
17.3 (3.5)
18.0
16
21.0 (3.4)
21.3

Clougherty et al. Environmental Health 2008 7:17   doi:10.1186/1476-069X-7-17