Air Quality
Excellent
No health implications.
10
PM2.5
28
PM10
146
O3
0.5
CO
7
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
24 May
74
Good
Sun
25 May
104
Light
Mon
26 May
112
Light
Tue
27 May
119
Light
Wed
28 May
123
Light
Thu
29 May
128
Light
Fri
30 May
35
Excellent
Air quality in the last 12 months (Chengyang)
|
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
|
|
|
2024/08
|
30
|
22
|
21
|
32
|
19
|
15
|
22
|
17
|
17
|
30
|
86
|
79
|
51
|
28
|
38
|
41
|
37
|
21
|
11
|
10
|
12
|
35
|
51
|
42
|
43
|
19
|
10
|
21
|
28
|
41
|
55
|
|
2024/07
|
26
|
11
|
30
|
25
|
22
|
17
|
20
|
20
|
19
|
50
|
59
|
66
|
43
|
28
|
23
|
18
|
17
|
36
|
34
|
16
|
27
|
19
|
17
|
25
|
14
|
18
|
24
|
29
|
38
|
33
|
35
|
|
2024/06
|
30
|
49
|
42
|
27
|
23
|
25
|
15
|
42
|
63
|
68
|
53
|
18
|
22
|
19
|
22
|
32
|
21
|
31
|
16
|
10
|
13
|
26
|
50
|
59
|
49
|
19
|
18
|
19
|
16
|
32
|
|
|
2024/05
|
52
|
54
|
38
|
29
|
17
|
45
|
69
|
62
|
55
|
45
|
133
|
81
|
71
|
90
|
46
|
58
|
59
|
47
|
31
|
31
|
20
|
22
|
33
|
26
|
19
|
30
|
39
|
39
|
36
|
26
|
36
|
|
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