Air Quality
Good
Some pollutants may slightly affect very few hypersensitive individuals.
8
PM2.5
74
*
PM10
97
O3
0.3
CO
2
SO2
2
NO2
Some pollutants may slightly affect very few hypersensitive individuals.
Advise
Only very few hypersensitive people should reduce outdoor activities.
Air Quality
Today
22 Mar
86
Good
Mon
23 Mar
76
Good
Tue
24 Mar
98
Good
Wed
25 Mar
110
Light
Thu
26 Mar
112
Light
Fri
27 Mar
82
Good
Sat
28 Mar
38
Excellent
Air quality in the last 12 months (Cheng'an)
|
2026/02
|
158
|
157
|
142
|
131
|
119
|
55
|
52
|
79
|
74
|
73
|
90
|
101
|
141
|
160
|
57
|
51
|
132
|
70
|
51
|
55
|
124
|
355
|
89
|
66
|
41
|
59
|
69
|
63
|
|||
|
2026/01
|
61
|
105
|
185
|
227
|
253
|
91
|
51
|
73
|
89
|
69
|
49
|
77
|
129
|
125
|
142
|
135
|
74
|
66
|
47
|
40
|
79
|
125
|
136
|
221
|
195
|
155
|
204
|
214
|
129
|
100
|
171
|
|
2025/12
|
127
|
45
|
53
|
74
|
104
|
122
|
80
|
71
|
156
|
201
|
152
|
37
|
68
|
76
|
106
|
197
|
159
|
218
|
198
|
151
|
98
|
72
|
91
|
111
|
57
|
80
|
147
|
202
|
173
|
127
|
39
|
|
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
|
|
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