Air Quality
Excellent
No health implications.
18
PM2.5
28
PM10
60
O3
0.4
CO
4
SO2
12
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 Jul
51
Good
Fri
18 Jul
52
Good
Sat
19 Jul
51
Good
Sun
20 Jul
47
Excellent
Mon
21 Jul
35
Excellent
Tue
22 Jul
42
Excellent
Wed
23 Jul
23
Excellent
Air quality in the last 12 months (Chengbu)
|
2025/06
|
26
|
18
|
35
|
44
|
46
|
40
|
28
|
25
|
34
|
35
|
36
|
27
|
29
|
20
|
23
|
27
|
14
|
13
|
17
|
20
|
20
|
14
|
18
|
17
|
26
|
29
|
22
|
17
|
18
|
18
|
|
|
2025/05
|
50
|
62
|
59
|
43
|
38
|
43
|
50
|
45
|
26
|
42
|
34
|
44
|
54
|
65
|
59
|
25
|
33
|
25
|
30
|
24
|
24
|
30
|
31
|
49
|
53
|
38
|
32
|
13
|
23
|
32
|
26
|
|
2025/04
|
51
|
57
|
66
|
119
|
112
|
83
|
99
|
114
|
99
|
68
|
59
|
110
|
206
|
126
|
89
|
83
|
78
|
76
|
45
|
32
|
44
|
31
|
53
|
33
|
32
|
41
|
31
|
37
|
57
|
50
|
|
|
2025/03
|
50
|
42
|
34
|
18
|
22
|
34
|
48
|
50
|
53
|
39
|
43
|
54
|
50
|
26
|
16
|
43
|
39
|
39
|
50
|
50
|
62
|
71
|
81
|
83
|
92
|
84
|
84
|
75
|
36
|
21
|
41
|
|
2025/02
|
17
|
14
|
47
|
63
|
63
|
64
|
46
|
72
|
47
|
55
|
74
|
73
|
72
|
81
|
48
|
42
|
38
|
43
|
32
|
21
|
73
|
24
|
39
|
85
|
63
|
54
|
37
|
48
|
|||
|
2025/01
|
107
|
106
|
115
|
144
|
154
|
99
|
83
|
83
|
50
|
59
|
63
|
71
|
71
|
72
|
75
|
67
|
73
|
90
|
89
|
89
|
103
|
119
|
142
|
189
|
51
|
24
|
50
|
81
|
198
|
108
|
44
|
|
2024/12
|
61
|
72
|
88
|
114
|
48
|
28
|
38
|
55
|
91
|
29
|
29
|
61
|
65
|
55
|
49
|
52
|
69
|
67
|
84
|
96
|
95
|
89
|
87
|
95
|
97
|
96
|
83
|
115
|
112
|
112
|
90
|
|
2024/11
|
51
|
77
|
76
|
73
|
80
|
71
|
59
|
53
|
64
|
71
|
66
|
68
|
69
|
79
|
79
|
68
|
27
|
16
|
17
|
24
|
35
|
42
|
54
|
54
|
35
|
22
|
36
|
41
|
44
|
56
|
|
|
2024/10
|
27
|
46
|
58
|
54
|
54
|
62
|
59
|
49
|
47
|
53
|
64
|
69
|
89
|
68
|
41
|
34
|
44
|
34
|
17
|
20
|
26
|
19
|
30
|
39
|
44
|
50
|
42
|
52
|
62
|
56
|
54
|
|
2024/09
|
35
|
34
|
41
|
40
|
52
|
44
|
32
|
31
|
31
|
35
|
37
|
39
|
35
|
35
|
40
|
37
|
40
|
42
|
40
|
40
|
30
|
31
|
40
|
45
|
58
|
60
|
55
|
57
|
54
|
55
|
|
|
2024/08
|
14
|
20
|
22
|
27
|
29
|
28
|
31
|
27
|
27
|
27
|
23
|
32
|
32
|
40
|
44
|
39
|
40
|
40
|
39
|
32
|
31
|
20
|
20
|
20
|
28
|
31
|
35
|
30
|
36
|
38
|
43
|
|
2024/07
|
18
|
12
|
22
|
20
|
19
|
18
|
21
|
19
|
22
|
25
|
25
|
25
|
27
|
21
|
25
|
25
|
20
|
18
|
14
|
21
|
27
|
26
|
23
|
29
|
34
|
33
|
35
|
16
|
15
|
19
|
15
|
|
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