Air Quality
Heavy
Healthy people will commonly show symptoms. People with respiratory or heart diseases will be significantly affected and will experience reduced endurance in activities.
182
*
PM2.5
196
PM10
41
O3
1.0
CO
8
SO2
22
NO2
Healthy people will commonly show symptoms. People with respiratory or heart diseases will be significantly affected and will experience reduced endurance in activities.
Advise
Children, seniors and individuals with heart or lung diseases should stay indoors and avoid outdoor activities. General population should reduce outdoor activities.
Air Quality
Today
18 Dec
201
Heavy
Fri
19 Dec
206
Heavy
Sat
20 Dec
159
Moderate
Sun
21 Dec
75
Good
Mon
22 Dec
93
Good
Tue
23 Dec
127
Light
Wed
24 Dec
39
Excellent
Air quality in the last 12 months (Cheng'an)
|
2025/11
|
86
|
53
|
89
|
115
|
141
|
239
|
93
|
76
|
65
|
94
|
125
|
122
|
98
|
101
|
121
|
114
|
38
|
42
|
58
|
77
|
87
|
95
|
73
|
87
|
52
|
138
|
159
|
146
|
169
|
209
|
|
|
2025/10
|
61
|
28
|
39
|
44
|
28
|
18
|
34
|
28
|
10
|
15
|
25
|
28
|
31
|
42
|
57
|
63
|
37
|
24
|
44
|
33
|
44
|
68
|
88
|
105
|
75
|
127
|
135
|
144
|
90
|
194
|
203
|
|
2025/09
|
39
|
38
|
31
|
31
|
42
|
51
|
57
|
57
|
27
|
35
|
47
|
32
|
46
|
51
|
39
|
45
|
19
|
31
|
26
|
40
|
57
|
24
|
38
|
41
|
47
|
57
|
30
|
45
|
52
|
58
|
|
|
2025/08
|
41
|
44
|
40
|
42
|
37
|
37
|
47
|
44
|
19
|
24
|
38
|
21
|
34
|
39
|
32
|
19
|
22
|
31
|
35
|
31
|
29
|
31
|
27
|
17
|
32
|
42
|
51
|
31
|
42
|
28
|
29
|
|
2025/07
|
23
|
29
|
31
|
34
|
35
|
30
|
39
|
36
|
48
|
59
|
54
|
58
|
59
|
59
|
52
|
43
|
42
|
36
|
47
|
46
|
34
|
38
|
21
|
23
|
31
|
37
|
36
|
36
|
34
|
31
|
35
|
|
2025/06
|
77
|
83
|
46
|
51
|
78
|
84
|
101
|
76
|
69
|
50
|
65
|
58
|
57
|
58
|
44
|
27
|
39
|
49
|
36
|
38
|
42
|
47
|
48
|
48
|
54
|
43
|
55
|
35
|
24
|
28
|
|
|
2025/05
|
49
|
74
|
47
|
48
|
158
|
97
|
82
|
77
|
26
|
31
|
51
|
57
|
64
|
59
|
38
|
66
|
134
|
69
|
94
|
73
|
73
|
59
|
57
|
47
|
54
|
65
|
57
|
61
|
61
|
59
|
59
|
|
2025/04
|
71
|
45
|
64
|
88
|
58
|
78
|
99
|
75
|
69
|
87
|
93
|
169
|
65
|
43
|
57
|
122
|
188
|
82
|
31
|
63
|
57
|
59
|
70
|
61
|
71
|
81
|
81
|
60
|
56
|
79
|
|
|
2025/03
|
189
|
79
|
43
|
38
|
59
|
61
|
74
|
96
|
90
|
101
|
101
|
131
|
127
|
76
|
58
|
36
|
46
|
49
|
53
|
45
|
48
|
59
|
103
|
213
|
190
|
99
|
103
|
171
|
57
|
60
|
66
|
|
2025/02
|
82
|
129
|
85
|
52
|
48
|
94
|
56
|
45
|
72
|
83
|
127
|
110
|
77
|
76
|
79
|
61
|
56
|
61
|
53
|
57
|
71
|
51
|
41
|
68
|
70
|
89
|
103
|
155
|
|||
|
2025/01
|
127
|
62
|
79
|
140
|
100
|
49
|
53
|
53
|
46
|
64
|
72
|
55
|
82
|
100
|
54
|
59
|
86
|
94
|
110
|
122
|
199
|
79
|
74
|
94
|
102
|
73
|
27
|
48
|
186
|
126
|
78
|
|
2024/12
|
93
|
48
|
54
|
128
|
106
|
89
|
44
|
63
|
92
|
149
|
89
|
96
|
87
|
72
|
58
|
66
|
80
|
49
|
52
|
67
|
45
|
50
|
77
|
132
|
185
|
92
|
64
|
51
|
71
|
84
|
103
|
|
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