Table 1.
Descriptive statistics for the 24-hour PM mass concentrations (μg/m 3 ) in the urban and suburban sampling sites
|
PM |
Urban sampling site |
Suburban sampling site |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Average | SD | Min | Max | Median | % exceed from standard level | Average | SD | Min | Max | Median | % exceed from standard level | |
|
TSP |
September |
143.4 |
60.4 |
67.9 |
227.6 |
146.4 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
| |
October |
209.8 |
71.8 |
113.1 |
313.2 |
209.8 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
| |
November |
70.5 |
65.2 |
26.5 |
183.2 |
37.9 |
-- |
204.9 |
11.4 |
191.8 |
212.8 |
210.00 |
-- |
| |
December |
112.0 |
36.1 |
76.4 |
169.9 |
112.0 |
-- |
193.4 |
21.0 |
171.5 |
213.3 |
195.40 |
-- |
| |
January |
184.5 |
98.6 |
104.7 |
480.4 |
155.1 |
-- |
219.5 |
61.4 |
154.5 |
276.5 |
227.45 |
-- |
| |
February |
178.4 |
55.2 |
101.5 |
255.6 |
178.4 |
-- |
148.1 |
21.1 |
130.4 |
171.4 |
142.50 |
-- |
| |
March |
139.5 |
66.5 |
78.6 |
251.7 |
119.9 |
-- |
86.6 |
26.0 |
56.9 |
105.5 |
97.49 |
-- |
| |
April |
97.8 |
34.1 |
45.7 |
138.9 |
97.7 |
-- |
183.9 |
10.6 |
173.7 |
194.9 |
183.10 |
-- |
| |
May |
93.5 |
10.9 |
75.6 |
105.6 |
95.5 |
-- |
214.3 |
47.3 |
162.6 |
255.3 |
224.99 |
-- |
| |
June |
102 |
36.6 |
65.8 |
134.4 |
98.5 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
| |
Overall |
142.2 |
76.3 |
26.5 |
480.4 |
127.5 |
-- |
178.7 |
52.7 |
56.9 |
276.5 |
183.0 |
-- |
|
PM
10
|
September |
84.9 |
40.0 |
38.2 |
147.8 |
86.2 |
67 |
-- |
-- |
-- |
-- |
-- |
-- |
| |
October |
129.5 |
48.3 |
62.7 |
197.1 |
129.5 |
100 |
-- |
-- |
-- |
-- |
-- |
-- |
| |
November |
44.2 |
41.2 |
14.9 |
115.3 |
24.5 |
20 |
142.4 |
13.3 |
131.1 |
157.1 |
139.06 |
100 |
| |
December |
84.3 |
21.9 |
65.5 |
121.2 |
79.6 |
100 |
115.1 |
10.9 |
103.3 |
124.6 |
117.42 |
100 |
| |
January |
109.7 |
33.0 |
67.4 |
230.0 |
97.4 |
100 |
106.2 |
17.3 |
87.5 |
121.8 |
109.40 |
74 |
| |
February |
106.2 |
40.6 |
56.0 |
167.2 |
106.2 |
100 |
111.2 |
21.7 |
98.4 |
136.3 |
98.85 |
100 |
| |
March |
95.1 |
46.9 |
50.5 |
174.0 |
80.2 |
80 |
53.1 |
14.4 |
36.7 |
63.8 |
58.80 |
35 |
| |
April |
44.2 |
15.8 |
21.3 |
65.9 |
44.2 |
20 |
134.2 |
9.7 |
125.4 |
144.5 |
132.80 |
100 |
| |
May |
43.3 |
9.8 |
33.1 |
58.5 |
40.6 |
40 |
106.9 |
19.1 |
85.6 |
122.5 |
112.72 |
100 |
| |
June |
47.2 |
18.5 |
30.6 |
71.3 |
49.0 |
25 |
-- |
-- |
-- |
-- |
-- |
-- |
| |
Overall |
85.2 |
43.9 |
14.9 |
197.1 |
82.3 |
72 |
109.9 |
30.2 |
36.7 |
157.1 |
108.9 |
-- |
|
PM
2.5
|
September |
38.7 |
18.2 |
18.6 |
65.2 |
38.8 |
67 |
-- |
-- |
-- |
-- |
-- |
-- |
| |
October |
55.5 |
18.8 |
25.6 |
75.3 |
55.5 |
80 |
-- |
-- |
-- |
-- |
-- |
-- |
| |
November |
22.8 |
14.0 |
12.0 |
46.8 |
18.0 |
20 |
43.5 |
6.5 |
36.8 |
49.7 |
44.02 |
100 |
| |
December |
41.3 |
22.2 |
15.0 |
76.0 |
41.0 |
80 |
44.9 |
6.4 |
40.5 |
52.3 |
42.00 |
100 |
| |
January |
47.7 |
14.0 |
31.7 |
79.0 |
43.2 |
100 |
38.7 |
12.9 |
23.9 |
46.8 |
45.48 |
82 |
| |
February |
53.0 |
25.3 |
35.1 |
96.6 |
42.4 |
100 |
47.2 |
9.4 |
38.6 |
57.3 |
45.60 |
100 |
| |
March |
40.2 |
12.5 |
23.1 |
56.4 |
41.8 |
80 |
21.6 |
5.6 |
15.6 |
26.7 |
22.42 |
44 |
| |
April |
23.8 |
7.6 |
13.5 |
34.7 |
23.3 |
40 |
48.9 |
2.5 |
46.4 |
51.4 |
48.90 |
100 |
| |
May |
20.0 |
5.0 |
13.4 |
25.4 |
21.5 |
20 |
35.2 |
3.1 |
32.2 |
38.5 |
34.81 |
87 |
| |
June |
24.1 |
6.5 |
15.9 |
38.4 |
24.7 |
30 |
-- |
-- |
-- |
-- |
-- |
-- |
| |
Overall |
39.0 |
19.1 |
12.0 |
96.6 |
36.6 |
71 |
40.0 |
10.9 |
15.6 |
57.3 |
41.6 |
-- |
|
PM
1
|
September |
24.1 |
13.1 |
10.6 |
45.9 |
23.1 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
| |
October |
30.6 |
9.3 |
15.6 |
40.6 |
30.6 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
| |
November |
14.6 |
6.7 |
8.7 |
25.6 |
14.0 |
-- |
37.2 |
5.9 |
30.8 |
42.3 |
38.64 |
-- |
| |
December |
32.7 |
18.3 |
11.3 |
60.0 |
32.7 |
-- |
34.6 |
2.5 |
31.8 |
36.4 |
35.65 |
-- |
| |
January |
40.3 |
10.8 |
28.0 |
66.0 |
37.8 |
-- |
30.2 |
10.4 |
18.9 |
39.3 |
32.54 |
-- |
| |
February |
40.5 |
18.9 |
23.2 |
72.2 |
35.7 |
-- |
37.9 |
7.9 |
31.6 |
46.8 |
35.38 |
-- |
| |
March |
28.3 |
10.8 |
14.9 |
43.1 |
28.3 |
-- |
16.6 |
2.8 |
13.4 |
18.9 |
17.45 |
-- |
| |
April |
18.3 |
7.5 |
9.5 |
30.3 |
17.8 |
-- |
37.2 |
5.8 |
31.7 |
43.3 |
36.52 |
-- |
| |
May |
13.2 |
3.1 |
9.6 |
17.3 |
13.0 |
-- |
25.7 |
3.3 |
23.5 |
29.6 |
24.15 |
-- |
| |
June |
22.3 |
5.5 |
12.6 |
25.8 |
20.5 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
| Overall | 28.4 | 14.9 | 8.7 | 72.2 | 28.6 | -- | 31.4 | 9.1 | 13.4 | 46.8 | 31.5 | -- | |