Air Quality
Excellent
No health implications.
32
PM2.5
50
PM10
82
O3
0.6
CO
11
SO2
30
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
13 Mar
51
Good
Fri
14 Mar
50
Excellent
Sat
15 Mar
52
Good
Sun
16 Mar
56
Good
Mon
17 Mar
54
Good
Tue
18 Mar
19
Excellent
Wed
19 Mar
19
Excellent
Air quality in the last 12 months (Chengjiang)
|
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
|
|
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
|
||
|
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