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Table 2 Daily pollution and meteorological levels 2004 to 2011

From: Using community level strategies to reduce asthma attacks triggered by outdoor air pollution: a case crossover analysis

 

All Year

Warm (April to October)

Cold (September to March)

 

Percentile

 

Percentile

 

Percentile

% Complete

25th

50th

75th

% Complete

25th

50th

75th

% Complete

25th

50th

75th

CO (ppb)

99.9

186.8

246.5

336.9

99.8

178.6

239.1

318.0

100.0

198.8

261.0

374.5

NO2 (ppb)

99.8

7.3

10.5

14.5

99.7

6.1

8.9

12.2

100.0

9.7

13.2

17.1

O3 8 hr (ppb)

100.0

27.5

35.8

48.1

100.0

29.6

40.6

55.4

100.0

25.6

32.1

39.4

PM2.5 (μg/m3)

99.8

8.4

10.7

14.1

99.7

9.1

11.7

15.5

100.0

7.6

9.7

12.3

SO2 (ppb)

99.9

0.7

1.5

2.5

99.8

0.6

1.2

2.2

100.0

1.1

1.9

2.8

Temperature (°C)

100.0

16.5

22.7

27.6

100.0

24.0

26.9

28.9

100.0

11.1

15.4

19.4

Relative Humidity (%)

99.9

62.4

70.3

77.2

99.8

63.5

69.4

74.5

100.0

59.3

72.6

80.8

Apparent Temperature (°C)

99.9

15.5

24.5

31.9

99.8

26.1

31.0

33.7

100.0

8.9

14.0

20.2