Air Quality
Excellent
No health implications.
14
PM2.5
23
PM10
114
O3
0.3
CO
3
SO2
5
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 Mar
56
Good
Fri
20 Mar
66
Good
Sat
21 Mar
64
Good
Sun
22 Mar
58
Good
Mon
23 Mar
51
Good
Tue
24 Mar
53
Good
Wed
25 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