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Water

Month

RSPM (µg/m3)

NOx (µg/m3)

SO2(µg/m3)

2013

2014

2015

2016

2017

2013

2014

2015

2016

2017

2013

2014

2015

2016

2017

January

270

129

141

129

110

32

35

34

30

32

5

7

6

6

6

February

180

104

144

115

108

27

17

35

26

32

5

7

6

6

6

March

171

110

125

120

101

33

33

35

31

27

6

6

6

6

6

April

159

149

132

129

106

31

37

36

37

31