Air Quality
Excellent
No health implications.
12
PM2.5
23
PM10
71
O3
0.8
CO
6
SO2
17
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
15 Jul
66
Good
Wed
16 Jul
64
Good
Thu
17 Jul
77
Good
Fri
18 Jul
105
Light
Sat
19 Jul
95
Good
Sun
20 Jul
65
Good
Mon
21 Jul
21
Excellent
Air quality in the last 12 months (Chengde)
|
2025/06
|
48
|
45
|
25
|
23
|
35
|
33
|
28
|
35
|
46
|
24
|
39
|
56
|
45
|
45
|
19
|
18
|
32
|
49
|
41
|
29
|
24
|
32
|
41
|
57
|
58
|
51
|
52
|
30
|
49
|
38
|
|
|
2025/05
|
30
|
34
|
26
|
34
|
41
|
23
|
52
|
73
|
24
|
31
|
47
|
61
|
68
|
34
|
40
|
65
|
38
|
27
|
45
|
68
|
59
|
61
|
39
|
30
|
42
|
49
|
41
|
44
|
62
|
71
|
58
|
|
2025/04
|
44
|
20
|
41
|
59
|
23
|
46
|
62
|
36
|
41
|
54
|
75
|
101
|
45
|
28
|
49
|
64
|
60
|
35
|
24
|
48
|
57
|
44
|
63
|
37
|
34
|
67
|
36
|
41
|
55
|
49
|
|
|
2025/03
|
114
|
50
|
40
|
56
|
56
|
32
|
51
|
84
|
103
|
111
|
135
|
51
|
63
|
58
|
36
|
29
|
31
|
23
|
32
|
35
|
31
|
43
|
84
|
73
|
46
|
95
|
48
|
34
|
35
|
38
|
50
|
|
2025/02
|
80
|
67
|
19
|
19
|
20
|
45
|
25
|
16
|
28
|
56
|
87
|
50
|
58
|
58
|
72
|
35
|
20
|
32
|
30
|
28
|
22
|
31
|
22
|
39
|
50
|
47
|
87
|
122
|
|||
|
2025/01
|
62
|
32
|
42
|
66
|
61
|
31
|
29
|
25
|
24
|
32
|
46
|
47
|
51
|
40
|
31
|
56
|
70
|
84
|
56
|
68
|
58
|
46
|
74
|
104
|
121
|
82
|
20
|
30
|
113
|
37
|
62
|
|
2024/12
|
63
|
23
|
38
|
36
|
36
|
29
|
22
|
34
|
53
|
57
|
48
|
76
|
39
|
31
|
47
|
49
|
30
|
35
|
60
|
52
|
30
|
33
|
52
|
69
|
77
|
29
|
25
|
42
|
66
|
68
|
52
|
|
2024/11
|
100
|
66
|
56
|
30
|
39
|
39
|
74
|
103
|
107
|
93
|
63
|
57
|
54
|
56
|
45
|
43
|
32
|
41
|
62
|
65
|
41
|
38
|
53
|
80
|
57
|
18
|
22
|
26
|
33
|
44
|
|
|
2024/10
|
17
|
19
|
28
|
45
|
64
|
47
|
22
|
28
|
54
|
28
|
42
|
64
|
87
|
102
|
40
|
43
|
64
|
51
|
16
|
25
|
42
|
31
|
36
|
53
|
77
|
120
|
49
|
42
|
59
|
49
|
80
|
|
2024/09
|
23
|
17
|
24
|
42
|
26
|
28
|
23
|
33
|
48
|
22
|
27
|
25
|
27
|
22
|
21
|
36
|
26
|
34
|
51
|
16
|
13
|
18
|
28
|
46
|
47
|
25
|
39
|
49
|
53
|
14
|
|
|
2024/08
|
26
|
34
|
33
|
19
|
29
|
33
|
41
|
47
|
44
|
39
|
44
|
23
|
20
|
28
|
32
|
39
|
46
|
36
|
22
|
12
|
19
|
29
|
26
|
27
|
34
|
23
|
26
|
34
|
40
|
46
|
35
|
|
2024/07
|
32
|
39
|
24
|
32
|
47
|
44
|
33
|
44
|
57
|
50
|
60
|
50
|
48
|
46
|
51
|
39
|
20
|
26
|
32
|
27
|
43
|
24
|
46
|
50
|
20
|
19
|
29
|
27
|
39
|
24
|
18
|
|
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