Air Quality
Excellent
No health implications.
3
PM2.5
9
PM10
55
O3
0.4
CO
7
SO2
6
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 Sep
42
Excellent
Sun
22 Sep
36
Excellent
Mon
23 Sep
39
Excellent
Tue
24 Sep
52
Good
Wed
25 Sep
48
Excellent
Thu
26 Sep
54
Good
Air quality in the last 12 months (Chengkou)
|
2024/08
|
25
|
26
|
20
|
12
|
15
|
20
|
19
|
24
|
24
|
27
|
61
|
48
|
32
|
26
|
28
|
43
|
34
|
23
|
30
|
27
|
31
|
37
|
39
|
40
|
28
|
31
|
25
|
22
|
24
|
32
|
36
|
|
2024/07
|
20
|
21
|
25
|
19
|
15
|
15
|
24
|
16
|
14
|
28
|
14
|
13
|
20
|
10
|
16
|
22
|
23
|
20
|
21
|
20
|
23
|
22
|
27
|
28
|
41
|
34
|
29
|
31
|
19
|
10
|
15
|
|
2024/06
|
43
|
48
|
37
|
21
|
18
|
22
|
27
|
24
|
26
|
31
|
29
|
30
|
34
|
32
|
33
|
24
|
19
|
21
|
20
|
17
|
11
|
17
|
26
|
36
|
24
|
30
|
31
|
33
|
26
|
34
|
|
|
2024/05
|
19
|
22
|
21
|
15
|
27
|
41
|
45
|
38
|
31
|
30
|
33
|
54
|
57
|
55
|
51
|
45
|
52
|
64
|
24
|
19
|
32
|
37
|
36
|
38
|
41
|
19
|
23
|
39
|
24
|
23
|
35
|
|
2024/04
|
38
|
26
|
38
|
32
|
35
|
27
|
21
|
30
|
36
|
31
|
24
|
31
|
36
|
38
|
51
|
47
|
33
|
30
|
36
|
72
|
68
|
55
|
47
|
55
|
33
|
37
|
38
|
27
|
32
|
21
|
|
|
2024/03
|
53
|
49
|
54
|
65
|
62
|
56
|
48
|
55
|
53
|
60
|
58
|
55
|
51
|
43
|
55
|
56
|
60
|
26
|
42
|
63
|
58
|
58
|
53
|
23
|
21
|
29
|
29
|
43
|
47
|
43
|
43
|
|
2024/02
|
57
|
23
|
21
|
24
|
38
|
48
|
52
|
49
|
67
|
151
|
75
|
53
|
56
|
63
|
36
|
33
|
34
|
47
|
398
|
54
|
15
|
21
|
29
|
31
|
44
|
52
|
53
|
53
|
55
|
||
|
2024/01
|
109
|
82
|
49
|
57
|
73
|
98
|
106
|
83
|
76
|
75
|
89
|
76
|
96
|
125
|
89
|
46
|
42
|
37
|
16
|
24
|
33
|
28
|
27
|
39
|
55
|
54
|
49
|
58
|
64
|
72
|
96
|
|
2023/12
|
41
|
43
|
51
|
64
|
55
|
63
|
63
|
67
|
92
|
100
|
28
|
19
|
22
|
21
|
27
|
39
|
42
|
39
|
50
|
55
|
86
|
79
|
86
|
88
|
89
|
96
|
112
|
158
|
194
|
151
|
105
|
|
2023/11
|
37
|
48
|
38
|
22
|
18
|
25
|
33
|
33
|
43
|
46
|
23
|
27
|
23
|
24
|
26
|
54
|
58
|
53
|
54
|
62
|
58
|
68
|
69
|
62
|
49
|
38
|
39
|
46
|
59
|
43
|
|
|
2023/10
|
17
|
18
|
13
|
13
|
18
|
20
|
16
|
19
|
26
|
25
|
26
|
34
|
38
|
37
|
32
|
34
|
43
|
41
|
18
|
16
|
21
|
23
|
38
|
47
|
46
|
34
|
32
|
21
|
28
|
34
|
37
|
|
2023/09
|
35
|
45
|
36
|
36
|
36
|
36
|
35
|
36
|
41
|
37
|
25
|
15
|
21
|
25
|
30
|
33
|
38
|
26
|
12
|
18
|
22
|
16
|
17
|
13
|
10
|
9
|
12
|
12
|
12
|
14
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
- Excellent
- Good
- Lightly
- Moderately
- Heavily
- Severely
Air quality source: CNEMC
*: primary pollution