Table 1 Descriptive statistics of pollutant levels

August-November 2004-2008

CO (ppm)

610

0.06

0.36

0.29

0.42

0.23

1.6

NO₂ (ppbhm)

610

0.55

2.05

0.79

2.05

0.61

4.15

O₃ 1 hourly (ppbhm)

610

1.57

3.38

1.08

3.62

0.95

8.73

PM₁₀ (μg/m³)

610

10.57

34.69

18.53

38.84

23.13

258.18

PM_2.5 (μg/m³)

610

3.3

13.83

9.47

16.08

12.39

174.42

SO₂ (ppbhm)

610

0

0.21

0.21

0.25

0.17

0.9

Rel. humidity (%)

610

26.5

65.89

16.67

64.63

12.58

91.26

Temperature (C)

610

7.12

15.45

5.98

15.66

3.95

28.28

August-November 2009

CO (ppm)

122

0.13

0.47

0.36

0.54

0.25

1.24

NO₂ (ppbhm)

122

0.25

1.81

0.92

1.85

0.62

3.33

O₃ 1 hourly (ppbhm)

122

2.03

3.25

0.73

3.42

0.73

5.99

PM₁₀ (μg/m³)

122

13.95

38.48

31.42

165.75

1156.62

11704.8

PM_2.5 (μg/m³)

122

4.22

14.66

15.53

34.13

161.05

1637.82

SO₂ (ppbhm)

122

0

0.22

0.18

0.24

0.18

0.89

Rel. humidity (%)

122

35.29

65.97

18.4

63.88

14.16

89

Temperature (C)

122

8.37

15.37

5.05

15.41

3.41

27.5

23/9/09-6/10/09

CO (ppm)

14

0.13

0.36

0.3

0.44

0.23

0.82

NO₂ (ppbhm)

14

0.25

1.49

1.06

1.63

0.83

3.18

O₃ 1 hourly (ppbhm)

14

2.7

3.11

0.34

3.2

0.41

4.12

PM₁₀ (μg/m³)

14

14.07

47.57

43.75

925.25

3108.95

11704.8

PM_2.5 (μg/m³)

14

5.58

12.5

18.3

137.85

432.57

1637.82

SO₂ (ppbhm)

14

0

0.11

0.19

0.13

0.1

0.29

Rel. humidity (%)

14

35.58

52.2

38.12

59.51

20.64

88.54

Temperature (C)

14

12.2

14.65

3.27

15.19

2.46

20.8

23/09/2009 ^b

CO (ppm)

1

0.33

NO₂ (ppbhm)

1

0.56

O₃ 1 hourly (ppbhm)

1

2.98

PM₁₀ (μg/m³)

1

11704.8

PM_2.5 (μg/m³)

1

1637.82

SO₂ (ppbhm)

1

0.06

Rel. humidity (%)

1

48

Temperature (C)

1

17.52