Air Quality
Excellent
No health implications.
5
PM2.5
8
PM10
36
O3
0.4
CO
3
SO2
7
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 Aug
34
Excellent
Fri
22 Aug
33
Excellent
Sat
23 Aug
32
Excellent
Sun
24 Aug
35
Excellent
Mon
25 Aug
33
Excellent
Tue
26 Aug
44
Excellent
Wed
27 Aug
24
Excellent
Air quality in the last 12 months (Chengjiang)
|
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
|
|
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
|
|
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