Air Quality
Excellent
No health implications.
9
PM2.5
19
PM10
90
O3
0.3
CO
5
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 Jul
89
Good
Fri
18 Jul
103
Light
Sat
19 Jul
91
Good
Sun
20 Jul
59
Good
Mon
21 Jul
56
Good
Tue
22 Jul
42
Excellent
Wed
23 Jul
33
Excellent
Air quality in the last 12 months (Chengyang)
|
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
|
|
|
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
|
|
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