Air Quality
Excellent
No health implications.
31
PM2.5
47
PM10
112
O3
0.5
CO
7
SO2
10
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
24 Apr
83
Good
Fri
25 Apr
84
Good
Sat
26 Apr
80
Good
Sun
27 Apr
80
Good
Mon
28 Apr
80
Good
Tue
29 Apr
64
Good
Wed
30 Apr
29
Excellent
Air quality in the last 12 months (Chengjiang)
|
2025/02
|
44
|
48
|
28
|
40
|
49
|
47
|
32
|
39
|
45
|
34
|
39
|
46
|
54
|
54
|
57
|
57
|
42
|
40
|
42
|
49
|
58
|
49
|
53
|
27
|
29
|
24
|
28
|
38
|
|||
|
2025/01
|
31
|
35
|
45
|
38
|
36
|
49
|
38
|
36
|
43
|
27
|
23
|
44
|
35
|
44
|
78
|
71
|
48
|
35
|
64
|
44
|
45
|
38
|
32
|
23
|
25
|
29
|
42
|
52
|
72
|
32
|
31
|
|
2024/12
|
20
|
22
|
20
|
19
|
19
|
19
|
22
|
30
|
16
|
21
|
30
|
24
|
32
|
38
|
38
|
34
|
23
|
30
|
39
|
31
|
32
|
30
|
30
|
33
|
34
|
40
|
43
|
36
|
32
|
24
|
41
|
|
2024/11
|
28
|
33
|
44
|
42
|
43
|
49
|
32
|
26
|
22
|
30
|
23
|
20
|
20
|
25
|
26
|
26
|
31
|
30
|
33
|
32
|
18
|
25
|
20
|
19
|
20
|
32
|
19
|
25
|
22
|
18
|
|
|
2024/10
|
16
|
18
|
29
|
25
|
20
|
28
|
39
|
40
|
27
|
16
|
21
|
22
|
22
|
25
|
24
|
16
|
15
|
26
|
36
|
23
|
18
|
25
|
27
|
32
|
27
|
35
|
45
|
49
|
48
|
37
|
28
|
|
2024/09
|
24
|
22
|
26
|
18
|
18
|
31
|
28
|
10
|
10
|
10
|
14
|
13
|
26
|
29
|
32
|
24
|
20
|
22
|
24
|
31
|
27
|
17
|
22
|
39
|
37
|
36
|
28
|
20
|
20
|
22
|
|
|
2024/08
|
37
|
28
|
19
|
16
|
17
|
13
|
14
|
13
|
12
|
17
|
33
|
47
|
53
|
41
|
34
|
33
|
34
|
38
|
31
|
41
|
32
|
19
|
16
|
19
|
20
|
14
|
19
|
24
|
24
|
34
|
29
|
|
2024/07
|
11
|
18
|
14
|
9
|
15
|
15
|
12
|
13
|
13
|
13
|
10
|
13
|
13
|
14
|
16
|
14
|
17
|
15
|
15
|
16
|
12
|
11
|
18
|
23
|
17
|
21
|
26
|
24
|
22
|
14
|
20
|
|
2024/06
|
33
|
23
|
30
|
28
|
16
|
15
|
15
|
18
|
16
|
11
|
17
|
21
|
11
|
17
|
25
|
15
|
25
|
25
|
30
|
34
|
21
|
21
|
17
|
17
|
18
|
12
|
12
|
11
|
12
|
13
|
|
|
2024/05
|
54
|
47
|
29
|
50
|
45
|
35
|
34
|
38
|
24
|
21
|
25
|
31
|
22
|
31
|
26
|
17
|
29
|
31
|
26
|
20
|
31
|
33
|
39
|
29
|
21
|
10
|
12
|
18
|
19
|
28
|
21
|
|
2024/04
|
31
|
41
|
55
|
53
|
54
|
72
|
61
|
58
|
60
|
68
|
74
|
76
|
62
|
47
|
55
|
74
|
83
|
52
|
43
|
38
|
37
|
45
|
50
|
48
|
42
|
45
|
51
|
59
|
49
|
53
|
|
|
2024/03
|
43
|
50
|
38
|
37
|
26
|
30
|
36
|
59
|
52
|
51
|
35
|
66
|
58
|
54
|
56
|
56
|
75
|
53
|
54
|
60
|
54
|
37
|
25
|
32
|
31
|
45
|
52
|
49
|
48
|
62
|
59
|
|
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