Table 2

Daily average air pollutant concentrations, Sydney, April 1997–December 2000
Air pollutant
 All year
 Summer
 Autumn
 Winter
 Spring
PM10 (μg/m3) 24 hour average




     Mean (SD1)
 16.3 (6.38)
 18.2 (7.20)
 17.0 (6.23)
 14.5 (5.57)
 15.7 (5.82)
     Median (IQR2)
 15.4 (7.51)
 17.0 (8.13)
 16.0 (7.92)
 14.0 (7.47)
 14.97 (6.95)
PM2.5 (μg/m3) 24 hour average




     Mean (SD)
 9.0 (3.94)
 8.7 (4.19)
 9.4 (3.61)
 9.5 (4.22)
 8.5 (3.61)
     Median (IQR)
 8.2 (4.54)
 7.7 (4.03)
 8.9 (4.57)
 8.8 (5.34)
 7.6 (3.80)
O3 (ppb3) 1 hour maximum




     Mean (SD)
 30.9 (14.19)
 37.7 (18.89)
 28.3 (12.54)
 23.3 (5.78)
 34.3 (11.87)
     Median (IQR)
 27.2 (13.43)
 33.1 (26.20)
 25.0 (12.51)
 24.0 (5.56)
 31.5 (11.05)
NO2 (ppb) 1 hour maximum




     Mean (SD)
 23.4 (7.58)
 18.0 (7.01)
 25.1 (7.91)
 25.9 (5.43)
 24.4 (7.09)
     Median (IQR)
 23.0 (9.45)
 16.0 (7.99)
 23.8 (9.51)
 25.7 (6.23)
 23.2 (8.67
CO (ppm4) 8 hour maximum




     Mean (SD)
 0.9 (0.68)
 0.5 (0.24)
 1.0 (0.69)
 1.3 (0.84)
 0.6 (0.35)
     Median (IQR)
 0.7 (0.73)
 0.4 (0.32)
 0.9 (0.82)
 1.2 (1.07)
 0.5 (0.49)
SO2 (ppb) 1 hour maximum




     Mean (SD)
 3.6 (1.95)
 3.6 (2.37)
 3.6 (1.93)
 3.8 (1.69)
 3.6 (1.74)
     Median (IQR)
 3.3 (2.24)
 3.1 (2.58)
 3.3 (2.16)
 3.6 (1.88)
 3.2 (2.30)
Temperature (°C) 24 hour average




     Mean (SD)
 17.7 (4.50)
 22.4 (2.41)
 18.3 (3.45)
 12.4 (1.77)
 17.7 (3.02)
     Median (IQR)
 17.8 (7.38)
 22.4 (3.50)
 18.4 (5.30)
 12.1 (2.50)
 17.5 (4.10)
Relative humidity (%) 24 hour average




     Mean (SD)
 70.8 (11.49)
 70.2 (10.26)
 73.9 (10.45)
 71.5 (12.06)
 67.5 (12.13)
     Median (IQR)
 71.4 (14.99)
 69.8 (13.33)
 74.1 (12.82)
 72.0 (15.97)
 67.8 (15.43)

1SD = Standard deviation; 2IQR = Inter-quartile range; 3ppb = parts per billion; 4ppm = parts per million

Jalaludin et al. Environmental Health 2007 6:16   doi:10.1186/1476-069X-6-16

Open Data