Air Quality
Excellent
No health implications.
19
PM2.5
39
PM10
60
O3
0.3
CO
4
SO2
17
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 Oct
47
Excellent
Wed
22 Oct
41
Excellent
Thu
23 Oct
43
Excellent
Fri
24 Oct
58
Good
Sat
25 Oct
58
Good
Sun
26 Oct
57
Good
Mon
27 Oct
50
Excellent
Air quality in the last 12 months (Chengyang)
|
2025/08
|
12
|
16
|
13
|
21
|
17
|
15
|
23
|
21
|
10
|
17
|
24
|
14
|
15
|
22
|
19
|
28
|
39
|
36
|
31
|
31
|
26
|
33
|
42
|
27
|
35
|
22
|
20
|
26
|
33
|
20
|
15
|
|
2025/07
|
31
|
35
|
41
|
42
|
45
|
45
|
38
|
13
|
24
|
33
|
29
|
35
|
28
|
21
|
30
|
21
|
26
|
27
|
22
|
18
|
17
|
15
|
15
|
19
|
21
|
18
|
20
|
16
|
15
|
16
|
15
|
|
2025/06
|
37
|
23
|
34
|
29
|
40
|
46
|
41
|
28
|
18
|
19
|
17
|
20
|
11
|
10
|
24
|
39
|
42
|
41
|
15
|
16
|
44
|
39
|
44
|
31
|
39
|
53
|
30
|
35
|
14
|
17
|
|
|
2025/05
|
51
|
43
|
30
|
37
|
21
|
20
|
34
|
38
|
22
|
35
|
48
|
60
|
56
|
58
|
45
|
35
|
51
|
36
|
64
|
67
|
50
|
55
|
50
|
49
|
37
|
50
|
49
|
25
|
38
|
36
|
41
|
|
2025/04
|
68
|
39
|
42
|
41
|
48
|
55
|
85
|
73
|
56
|
62
|
50
|
109
|
57
|
55
|
55
|
72
|
117
|
65
|
50
|
56
|
32
|
41
|
55
|
68
|
56
|
65
|
52
|
54
|
62
|
72
|
|
|
2025/03
|
25
|
33
|
40
|
29
|
27
|
46
|
37
|
83
|
89
|
62
|
32
|
68
|
52
|
57
|
50
|
40
|
50
|
33
|
48
|
62
|
60
|
70
|
88
|
119
|
112
|
110
|
108
|
65
|
42
|
48
|
70
|
|
2025/02
|
48
|
64
|
55
|
31
|
36
|
52
|
51
|
31
|
44
|
52
|
34
|
70
|
77
|
72
|
99
|
87
|
45
|
30
|
39
|
47
|
49
|
30
|
49
|
51
|
74
|
95
|
90
|
89
|
|||
|
2025/01
|
101
|
78
|
70
|
64
|
154
|
97
|
49
|
42
|
34
|
44
|
70
|
85
|
90
|
96
|
38
|
68
|
70
|
89
|
127
|
72
|
97
|
89
|
38
|
33
|
80
|
71
|
56
|
41
|
75
|
53
|
48
|
|
2024/12
|
71
|
70
|
41
|
72
|
116
|
87
|
46
|
49
|
73
|
117
|
48
|
60
|
70
|
54
|
64
|
64
|
86
|
34
|
54
|
78
|
54
|
51
|
76
|
67
|
107
|
58
|
55
|
66
|
72
|
81
|
67
|
|
2024/11
|
78
|
84
|
55
|
47
|
34
|
62
|
48
|
36
|
52
|
52
|
83
|
100
|
60
|
31
|
46
|
63
|
32
|
23
|
37
|
61
|
81
|
37
|
35
|
45
|
35
|
32
|
34
|
49
|
50
|
62
|
|
|
2024/10
|
18
|
23
|
39
|
38
|
15
|
32
|
39
|
47
|
56
|
80
|
63
|
61
|
41
|
20
|
52
|
40
|
33
|
13
|
36
|
37
|
31
|
42
|
43
|
57
|
56
|
60
|
65
|
38
|
75
|
83
|
79
|
|
2024/09
|
44
|
20
|
31
|
33
|
26
|
24
|
42
|
33
|
17
|
22
|
25
|
14
|
20
|
25
|
23
|
28
|
21
|
12
|
16
|
17
|
32
|
23
|
36
|
29
|
41
|
52
|
29
|
33
|
25
|
24
|
|
|
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