Air Quality
Excellent
No health implications.
20
PM2.5
29
PM10
74
O3
0.6
CO
2
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
13 Mar
51
Good
Sat
14 Mar
54
Good
Sun
15 Mar
54
Good
Mon
16 Mar
52
Good
Tue
17 Mar
54
Good
Wed
18 Mar
53
Good
Thu
19 Mar
33
Excellent
Air quality in the last 12 months (Chengjiang)
|
2026/02
|
30
|
31
|
34
|
39
|
39
|
40
|
41
|
42
|
31
|
30
|
29
|
26
|
26
|
33
|
38
|
50
|
69
|
49
|
34
|
29
|
22
|
25
|
34
|
39
|
42
|
36
|
31
|
42
|
|||
|
2026/01
|
38
|
29
|
21
|
19
|
28
|
28
|
31
|
29
|
29
|
25
|
44
|
31
|
50
|
33
|
51
|
26
|
34
|
34
|
32
|
28
|
24
|
28
|
29
|
31
|
27
|
35
|
32
|
35
|
32
|
33
|
41
|
|
2025/12
|
42
|
39
|
54
|
34
|
31
|
31
|
38
|
48
|
29
|
38
|
40
|
35
|
61
|
51
|
26
|
29
|
43
|
29
|
19
|
30
|
40
|
24
|
28
|
25
|
47
|
42
|
32
|
32
|
27
|
28
|
27
|
|
2025/11
|
25
|
10
|
8
|
13
|
14
|
12
|
17
|
26
|
11
|
11
|
14
|
19
|
25
|
24
|
28
|
34
|
28
|
23
|
18
|
32
|
42
|
34
|
27
|
41
|
40
|
54
|
45
|
49
|
46
|
44
|
|
|
2025/10
|
8
|
11
|
13
|
13
|
15
|
21
|
8
|
8
|
12
|
15
|
19
|
19
|
23
|
29
|
24
|
16
|
15
|
21
|
24
|
29
|
15
|
18
|
18
|
31
|
31
|
24
|
25
|
28
|
23
|
28
|
37
|
|
2025/09
|
21
|
21
|
16
|
16
|
16
|
20
|
25
|
24
|
17
|
18
|
15
|
13
|
12
|
9
|
13
|
15
|
17
|
22
|
19
|
24
|
18
|
20
|
13
|
11
|
23
|
8
|
9
|
14
|
8
|
7
|
|
|
2025/08
|
31
|
29
|
18
|
16
|
29
|
26
|
14
|
8
|
12
|
15
|
16
|
19
|
16
|
34
|
30
|
11
|
12
|
19
|
26
|
19
|
10
|
8
|
9
|
14
|
12
|
9
|
9
|
14
|
12
|
13
|
19
|
|
2025/07
|
13
|
8
|
12
|
15
|
17
|
16
|
20
|
11
|
18
|
17
|
22
|
25
|
34
|
24
|
31
|
31
|
25
|
29
|
18
|
23
|
18
|
11
|
10
|
11
|
11
|
13
|
16
|
22
|
36
|
30
|
16
|
|
2025/06
|
12
|
15
|
16
|
18
|
24
|
31
|
32
|
33
|
24
|
32
|
34
|
36
|
42
|
39
|
16
|
21
|
12
|
9
|
13
|
13
|
17
|
9
|
12
|
9
|
10
|
12
|
15
|
13
|
12
|
14
|
|
|
2025/05
|
35
|
24
|
21
|
16
|
22
|
26
|
26
|
31
|
43
|
34
|
19
|
26
|
28
|
28
|
24
|
22
|
29
|
22
|
34
|
24
|
32
|
30
|
51
|
32
|
18
|
14
|
13
|
13
|
9
|
11
|
11
|
|
2025/04
|
31
|
56
|
85
|
84
|
89
|
75
|
70
|
64
|
58
|
67
|
56
|
43
|
73
|
58
|
51
|
22
|
22
|
29
|
32
|
35
|
30
|
25
|
38
|
48
|
48
|
57
|
61
|
59
|
30
|
31
|
|
|
2025/03
|
40
|
43
|
48
|
45
|
53
|
48
|
36
|
53
|
45
|
37
|
52
|
61
|
60
|
65
|
55
|
39
|
33
|
20
|
33
|
46
|
65
|
65
|
54
|
43
|
41
|
46
|
49
|
88
|
108
|
73
|
63
|
|
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