Air Quality
Excellent
No health implications.
30
PM2.5
48
PM10
15
O3
0.6
CO
6
SO2
15
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
29 Oct
36
Excellent
Thu
30 Oct
35
Excellent
Fri
31 Oct
38
Excellent
Sat
1 Nov
43
Excellent
Sun
2 Nov
53
Good
Mon
3 Nov
21
Excellent
Tue
4 Nov
30
Excellent
Air quality in the last 12 months (Chengkou)
|
2025/08
|
27
|
25
|
29
|
33
|
31
|
23
|
26
|
20
|
17
|
13
|
18
|
23
|
20
|
27
|
23
|
18
|
23
|
24
|
30
|
22
|
19
|
20
|
18
|
19
|
23
|
26
|
26
|
25
|
18
|
18
|
22
|
|
2025/07
|
16
|
20
|
22
|
20
|
16
|
21
|
18
|
17
|
23
|
22
|
30
|
35
|
33
|
34
|
32
|
30
|
34
|
24
|
24
|
26
|
26
|
21
|
16
|
13
|
13
|
17
|
22
|
23
|
21
|
20
|
25
|
|
2025/06
|
15
|
23
|
36
|
40
|
36
|
40
|
23
|
22
|
27
|
38
|
36
|
40
|
38
|
28
|
40
|
50
|
37
|
30
|
15
|
25
|
19
|
22
|
24
|
25
|
20
|
15
|
22
|
25
|
16
|
20
|
|
|
2025/05
|
55
|
62
|
62
|
42
|
39
|
57
|
49
|
51
|
53
|
60
|
54
|
53
|
48
|
38
|
56
|
52
|
65
|
54
|
61
|
60
|
56
|
39
|
43
|
50
|
50
|
45
|
40
|
31
|
35
|
41
|
26
|
|
2025/04
|
46
|
60
|
61
|
53
|
60
|
63
|
56
|
55
|
55
|
42
|
41
|
336
|
200
|
105
|
67
|
66
|
64
|
64
|
65
|
45
|
42
|
70
|
68
|
54
|
56
|
53
|
46
|
43
|
43
|
38
|
|
|
2025/03
|
68
|
63
|
20
|
14
|
21
|
34
|
45
|
54
|
57
|
47
|
43
|
54
|
41
|
39
|
24
|
34
|
42
|
44
|
47
|
47
|
52
|
59
|
64
|
56
|
48
|
44
|
125
|
45
|
41
|
51
|
46
|
|
2025/02
|
48
|
35
|
38
|
42
|
47
|
33
|
45
|
55
|
57
|
56
|
67
|
63
|
57
|
52
|
47
|
44
|
51
|
46
|
65
|
79
|
78
|
51
|
40
|
71
|
70
|
57
|
53
|
62
|
|||
|
2025/01
|
110
|
113
|
129
|
153
|
84
|
78
|
84
|
63
|
58
|
65
|
70
|
63
|
67
|
85
|
59
|
60
|
77
|
87
|
89
|
93
|
104
|
147
|
191
|
76
|
17
|
43
|
61
|
65
|
128
|
96
|
90
|
|
2024/12
|
66
|
76
|
89
|
62
|
42
|
41
|
46
|
53
|
63
|
62
|
51
|
57
|
50
|
51
|
65
|
79
|
90
|
88
|
77
|
108
|
125
|
97
|
64
|
89
|
111
|
127
|
112
|
69
|
89
|
116
|
114
|
|
2024/11
|
47
|
38
|
40
|
40
|
31
|
39
|
50
|
63
|
49
|
40
|
52
|
50
|
38
|
30
|
36
|
27
|
10
|
12
|
17
|
21
|
27
|
33
|
43
|
42
|
20
|
41
|
46
|
48
|
54
|
58
|
|
|
2024/10
|
24
|
31
|
41
|
45
|
48
|
42
|
36
|
36
|
43
|
43
|
42
|
34
|
35
|
40
|
39
|
49
|
38
|
22
|
24
|
15
|
17
|
27
|
31
|
46
|
46
|
47
|
44
|
40
|
45
|
60
|
52
|
|
2024/09
|
35
|
38
|
27
|
31
|
39
|
35
|
42
|
41
|
42
|
29
|
44
|
31
|
28
|
32
|
26
|
21
|
22
|
26
|
33
|
29
|
14
|
22
|
31
|
37
|
46
|
67
|
59
|
80
|
60
|
16
|
|
|
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