Air Quality
Excellent
No health implications.
27
PM2.5
41
PM10
41
O3
0.5
CO
5
SO2
20
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
16 May
82
Good
Sat
17 May
69
Good
Sun
18 May
68
Good
Mon
19 May
69
Good
Tue
20 May
65
Good
Wed
21 May
22
Excellent
Thu
22 May
24
Excellent
Air quality in the last 12 months (Chengxiang)
|
2025/02
|
40
|
13
|
12
|
59
|
51
|
26
|
16
|
51
|
32
|
35
|
41
|
142
|
65
|
59
|
47
|
69
|
71
|
43
|
35
|
11
|
9
|
20
|
10
|
50
|
56
|
62
|
83
|
82
|
|||
|
2025/01
|
58
|
50
|
36
|
40
|
38
|
51
|
63
|
49
|
52
|
47
|
34
|
43
|
44
|
45
|
84
|
59
|
51
|
34
|
43
|
46
|
63
|
42
|
37
|
20
|
27
|
32
|
18
|
44
|
61
|
32
|
30
|
|
2024/12
|
39
|
42
|
22
|
36
|
33
|
32
|
20
|
54
|
29
|
26
|
25
|
14
|
20
|
50
|
77
|
52
|
41
|
36
|
42
|
25
|
38
|
61
|
26
|
21
|
25
|
50
|
66
|
81
|
43
|
44
|
53
|
|
2024/11
|
12
|
14
|
27
|
29
|
42
|
37
|
23
|
22
|
21
|
30
|
18
|
18
|
17
|
11
|
13
|
13
|
14
|
17
|
12
|
8
|
11
|
26
|
31
|
23
|
17
|
16
|
31
|
21
|
33
|
37
|
|
|
2024/10
|
10
|
8
|
13
|
10
|
9
|
16
|
15
|
10
|
27
|
42
|
41
|
33
|
23
|
34
|
24
|
22
|
32
|
37
|
29
|
14
|
23
|
24
|
28
|
31
|
16
|
13
|
18
|
12
|
32
|
35
|
18
|
|
2024/09
|
35
|
35
|
24
|
18
|
22
|
13
|
16
|
20
|
16
|
39
|
52
|
40
|
18
|
16
|
20
|
23
|
19
|
23
|
19
|
21
|
21
|
9
|
8
|
21
|
21
|
18
|
15
|
19
|
22
|
13
|
|
|
2024/08
|
31
|
47
|
57
|
51
|
43
|
29
|
35
|
44
|
47
|
51
|
50
|
51
|
34
|
24
|
21
|
20
|
20
|
23
|
23
|
12
|
21
|
30
|
33
|
42
|
40
|
42
|
63
|
50
|
42
|
46
|
40
|
|
2024/07
|
28
|
24
|
24
|
27
|
31
|
25
|
23
|
24
|
21
|
24
|
29
|
27
|
31
|
30
|
31
|
32
|
27
|
24
|
24
|
28
|
33
|
29
|
18
|
15
|
7
|
9
|
12
|
30
|
20
|
24
|
23
|
|
2024/06
|
13
|
8
|
14
|
25
|
23
|
13
|
27
|
30
|
31
|
28
|
25
|
29
|
29
|
29
|
24
|
15
|
25
|
27
|
36
|
22
|
27
|
35
|
32
|
25
|
27
|
28
|
29
|
23
|
21
|
25
|
|
|
2024/05
|
20
|
21
|
27
|
30
|
36
|
43
|
44
|
43
|
36
|
31
|
46
|
43
|
19
|
24
|
34
|
38
|
30
|
37
|
27
|
14
|
8
|
11
|
28
|
44
|
52
|
30
|
23
|
24
|
24
|
33
|
35
|
|
2024/04
|
33
|
53
|
46
|
37
|
16
|
31
|
20
|
40
|
22
|
47
|
47
|
66
|
53
|
56
|
67
|
60
|
50
|
32
|
60
|
63
|
30
|
40
|
41
|
28
|
54
|
52
|
44
|
30
|
48
|
36
|
|
|
2024/03
|
16
|
31
|
41
|
54
|
65
|
32
|
40
|
62
|
61
|
53
|
61
|
42
|
59
|
54
|
37
|
52
|
71
|
44
|
41
|
50
|
52
|
61
|
54
|
45
|
37
|
37
|
30
|
61
|
46
|
57
|
34
|
|
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