Air Quality
Excellent
No health implications.
20
PM2.5
37
PM10
83
O3
1.0
CO
11
SO2
12
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
20 Apr
85
Good
Sun
21 Apr
86
Good
Mon
22 Apr
87
Good
Tue
23 Apr
89
Good
Wed
24 Apr
88
Good
Thu
25 Apr
85
Good
Air quality in the last 12 months (Chengjiang)
|
2024/02
|
33
|
45
|
54
|
31
|
40
|
32
|
42
|
44
|
51
|
61
|
64
|
41
|
37
|
28
|
36
|
43
|
30
|
32
|
49
|
54
|
46
|
51
|
60
|
52
|
48
|
39
|
39
|
39
|
37
|
||
|
2024/01
|
32
|
28
|
47
|
32
|
24
|
33
|
30
|
29
|
34
|
41
|
38
|
37
|
40
|
39
|
38
|
21
|
22
|
25
|
28
|
36
|
33
|
24
|
40
|
40
|
31
|
21
|
31
|
29
|
28
|
28
|
25
|
|
2023/12
|
48
|
21
|
17
|
21
|
19
|
30
|
35
|
22
|
18
|
20
|
22
|
26
|
15
|
18
|
22
|
25
|
19
|
20
|
22
|
54
|
46
|
60
|
53
|
55
|
55
|
37
|
34
|
31
|
28
|
34
|
32
|
|
2023/11
|
38
|
25
|
25
|
27
|
25
|
37
|
28
|
21
|
24
|
28
|
26
|
30
|
34
|
20
|
18
|
29
|
48
|
45
|
42
|
48
|
32
|
40
|
43
|
42
|
26
|
41
|
50
|
54
|
43
|
51
|
|
|
2023/10
|
25
|
17
|
18
|
19
|
20
|
19
|
14
|
18
|
24
|
28
|
31
|
29
|
21
|
18
|
24
|
30
|
28
|
25
|
32
|
33
|
37
|
36
|
30
|
29
|
26
|
22
|
25
|
25
|
36
|
35
|
40
|
|
2023/09
|
42
|
35
|
37
|
34
|
28
|
32
|
35
|
43
|
28
|
27
|
30
|
26
|
30
|
36
|
42
|
37
|
33
|
24
|
19
|
21
|
20
|
24
|
20
|
24
|
26
|
27
|
19
|
14
|
16
|
22
|
|
|
2023/08
|
19
|
23
|
24
|
19
|
22
|
25
|
18
|
20
|
19
|
24
|
25
|
24
|
29
|
33
|
31
|
25
|
29
|
35
|
31
|
36
|
34
|
30
|
22
|
26
|
14
|
16
|
21
|
30
|
32
|
32
|
33
|
|
2023/07
|
25
|
23
|
22
|
23
|
27
|
14
|
16
|
18
|
17
|
14
|
15
|
15
|
14
|
21
|
35
|
33
|
43
|
37
|
26
|
21
|
26
|
21
|
23
|
26
|
20
|
22
|
23
|
22
|
23
|
30
|
31
|
|
2023/06
|
39
|
36
|
35
|
35
|
34
|
25
|
30
|
26
|
37
|
39
|
47
|
45
|
31
|
34
|
24
|
34
|
36
|
33
|
34
|
22
|
29
|
24
|
21
|
31
|
41
|
38
|
34
|
27
|
23
|
24
|
|
|
2023/05
|
38
|
34
|
34
|
31
|
30
|
34
|
37
|
47
|
51
|
51
|
47
|
29
|
42
|
39
|
30
|
28
|
44
|
47
|
48
|
48
|
44
|
48
|
48
|
50
|
47
|
37
|
36
|
42
|
38
|
42
|
39
|
|
2023/04
|
47
|
50
|
35
|
34
|
36
|
43
|
61
|
63
|
87
|
75
|
70
|
77
|
91
|
103
|
74
|
97
|
90
|
70
|
78
|
71
|
63
|
57
|
44
|
48
|
47
|
42
|
38
|
45
|
47
|
45
|
|
|
2023/03
|
56
|
75
|
73
|
54
|
72
|
75
|
78
|
65
|
62
|
73
|
66
|
60
|
29
|
67
|
77
|
56
|
43
|
56
|
54
|
37
|
28
|
27
|
28
|
34
|
43
|
52
|
55
|
68
|
50
|
44
|
50
|
|
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