Pollutants

Statistics

Season

Annual

Winter

Spring

Summer

Autumn

O₃ (ppb)

Min.

7.96

7.40

8.05

5.44

5.44

Max.

30.54

50.68

41.52

46.05

50.68

Median

16.49

26.08

24.40

19.88

20.92

Mean

17.20

25.79

24.91

20.94

22.51

S.D.

4.10

9.93

8.87

8.45

8.97

NO_x (ppb)

Min.

15.00

16.28

19.56

8.83

8.83

Max.

59.04

89.70

89.70

61.80

89.70

Median

27.58

28.80

26.72

41.36

31.12

Mean

29.16

30.41

29.26

42.53

32.84

S.D.

9.14

9.85

9.18

8.55

9.18

NO₂ (ppb)

Min.

8.88

9.68

9.36

5.42

5.42

Max.

23.32

36.74

25.68

31.00

36.74

Median

15.98

16.68

14.04

21.12

16.96

Mean

15.98

17.00

14.85

21.17

17.25

S.D.

3.42

3.55

3.43

3.16

3.39

NO (ppb)

Min.

6.04

6.16

6.36

6.67

6.04

Max.

34.48

25.28

27.68

45.47

45.47

Median

14.60

12.44

11.54

18.68

14.32

Mean

16.03

13.58

12.32

20.38

15.58

S.D.

7.10

5.31

3.94

6.92

5.82

SO₂ (ppb)

Min.

2.44

1.00

1.23

5.20

1.00

Max.

13.08

22.60

53.56

25.88

53.56

Median

3.54

4.72

3.06

8.72

5.01

Mean

4.39

6.48

5.51

10.24

6.66

S.D.

2.17

4.53

7.14

4.50

4.59

CO (ppb)

Min.

76.00

32.92

32.92

66.67

32.92

Max.

336.80

377.60

266.80

1006.67

1006.67

Median

153.20

153.60

123.40

162.40

148.15

Mean

161.42

170.86

134.00

194.25

165.13

S.D.

57.70

69.27

52.13

132.02

77.78

THC (ppm)

Min.

3.59

1.39

1.39

0.76

0.76

Max.

5.45

4.81

6.27

5.58

6.27

Median

4.51

2.59

4.18

4.31

3.90

Mean

4.55

2.90

4.01

4.05

3.88

S.D.

0.43

0.78

1.27

0.96

0.86

CH₄ (ppm)

Min.

3.19

1.24

1.34

0.64

0.64

Max.

4.99

4.70

5.65

4.85

5.65

Median

4.15

2.57

3.55

3.65

3.48

Mean

4.15

2.58

3.61

3.42

3.44

S.D.

0.46

0.77

1.25

0.84

0.83

TNMHC (ppm)

Min.

0.31

0.10

0.22

0.42

0.10

Max.

0.55

3.45

1.11

0.90

3.45

Median

0.42

0.56

0.41

0.67

0.52

Mean

0.42

0.70

0.43

0.67

0.56

S.D.

0.05

0.65

0.14

0.09

0.23