Air Quality
Good
Some pollutants may slightly affect very few hypersensitive individuals.
22
PM2.5
121
*
PM10
70
O3
0.5
CO
2
SO2
12
NO2
Some pollutants may slightly affect very few hypersensitive individuals.
Advise
Only very few hypersensitive people should reduce outdoor activities.
Air Quality
Today
12 Apr
141
Light
Sun
13 Apr
93
Good
Mon
14 Apr
59
Good
Tue
15 Apr
91
Good
Wed
16 Apr
94
Good
Thu
17 Apr
83
Good
Fri
18 Apr
93
Good
Air quality in the last 12 months (Cheng'an)
|
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
|
|
2024/11
|
67
|
82
|
107
|
44
|
40
|
70
|
73
|
59
|
58
|
132
|
170
|
177
|
135
|
75
|
76
|
86
|
59
|
52
|
52
|
68
|
76
|
82
|
85
|
65
|
54
|
25
|
50
|
38
|
37
|
74
|
|
|
2024/10
|
54
|
34
|
52
|
70
|
72
|
68
|
127
|
113
|
149
|
107
|
77
|
131
|
121
|
167
|
162
|
79
|
113
|
31
|
21
|
23
|
48
|
58
|
79
|
83
|
108
|
119
|
148
|
76
|
135
|
213
|
176
|
|
2024/09
|
46
|
27
|
35
|
47
|
35
|
27
|
43
|
62
|
68
|
28
|
23
|
26
|
33
|
43
|
32
|
45
|
49
|
47
|
46
|
49
|
18
|
29
|
43
|
73
|
89
|
123
|
126
|
94
|
68
|
23
|
|
|
2024/08
|
32
|
25
|
27
|
31
|
32
|
39
|
37
|
34
|
35
|
68
|
32
|
35
|
32
|
39
|
48
|
50
|
43
|
24
|
18
|
32
|
34
|
50
|
51
|
54
|
51
|
31
|
15
|
31
|
44
|
48
|
44
|
|
2024/07
|
27
|
38
|
45
|
46
|
31
|
27
|
32
|
28
|
47
|
59
|
77
|
41
|
59
|
97
|
89
|
49
|
50
|
36
|
34
|
14
|
33
|
35
|
26
|
42
|
15
|
22
|
28
|
20
|
12
|
17
|
17
|
|
2024/06
|
45
|
73
|
62
|
85
|
95
|
85
|
68
|
66
|
62
|
63
|
63
|
55
|
61
|
60
|
54
|
51
|
53
|
52
|
48
|
55
|
45
|
55
|
120
|
70
|
68
|
68
|
43
|
59
|
35
|
42
|
|
|
2024/05
|
53
|
57
|
52
|
46
|
54
|
75
|
82
|
65
|
66
|
62
|
149
|
103
|
100
|
81
|
44
|
53
|
60
|
76
|
67
|
45
|
58
|
58
|
65
|
61
|
67
|
68
|
43
|
52
|
58
|
44
|
51
|
|
2024/04
|
118
|
97
|
54
|
48
|
71
|
79
|
69
|
72
|
68
|
98
|
103
|
58
|
62
|
47
|
77
|
95
|
85
|
73
|
79
|
71
|
78
|
88
|
75
|
77
|
90
|
72
|
67
|
68
|
53
|
56
|
|
|
2024/03
|
81
|
88
|
80
|
90
|
100
|
75
|
90
|
38
|
70
|
84
|
90
|
106
|
99
|
121
|
69
|
94
|
78
|
80
|
97
|
80
|
100
|
107
|
116
|
75
|
43
|
72
|
53
|
189
|
188
|
121
|
88
|
|
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