Air Quality
Excellent
No health implications.
20
PM2.5
27
PM10
79
O3
0.5
CO
2
SO2
4
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
18 May
53
Good
Tue
19 May
53
Good
Wed
20 May
60
Good
Thu
21 May
70
Good
Fri
22 May
77
Good
Sat
23 May
38
Excellent
Sun
24 May
48
Excellent
Air quality in the last 12 months (Chengwu)
|
2026/04
|
55
|
58
|
57
|
63
|
82
|
71
|
63
|
43
|
40
|
59
|
60
|
56
|
36
|
40
|
54
|
60
|
76
|
74
|
67
|
79
|
61
|
35
|
42
|
39
|
42
|
49
|
86
|
52
|
46
|
52
|
|
|
2026/03
|
74
|
82
|
122
|
128
|
72
|
69
|
71
|
78
|
117
|
118
|
138
|
193
|
122
|
117
|
71
|
128
|
111
|
72
|
57
|
91
|
107
|
107
|
111
|
98
|
92
|
74
|
81
|
78
|
62
|
83
|
82
|
|
2026/02
|
119
|
160
|
136
|
116
|
172
|
62
|
59
|
63
|
60
|
86
|
134
|
94
|
116
|
105
|
109
|
50
|
134
|
89
|
89
|
69
|
60
|
324
|
101
|
46
|
55
|
71
|
121
|
119
|
|||
|
2026/01
|
44
|
67
|
101
|
114
|
248
|
129
|
61
|
64
|
69
|
93
|
53
|
71
|
111
|
188
|
110
|
117
|
66
|
52
|
50
|
33
|
51
|
78
|
110
|
153
|
186
|
154
|
203
|
116
|
110
|
123
|
126
|
|
2025/12
|
129
|
80
|
55
|
94
|
102
|
124
|
100
|
78
|
79
|
99
|
153
|
44
|
68
|
81
|
65
|
146
|
186
|
157
|
198
|
167
|
75
|
42
|
79
|
99
|
68
|
52
|
83
|
114
|
174
|
166
|
72
|
|
2025/11
|
110
|
88
|
59
|
81
|
99
|
73
|
66
|
99
|
77
|
71
|
60
|
76
|
111
|
165
|
173
|
153
|
42
|
54
|
62
|
88
|
156
|
100
|
87
|
116
|
53
|
107
|
236
|
124
|
103
|
140
|
|
|
2025/10
|
30
|
9
|
24
|
33
|
15
|
14
|
40
|
51
|
14
|
15
|
20
|
21
|
27
|
38
|
43
|
50
|
27
|
39
|
42
|
43
|
43
|
61
|
80
|
78
|
88
|
97
|
106
|
91
|
69
|
80
|
193
|
|
2025/09
|
24
|
34
|
39
|
45
|
48
|
33
|
50
|
23
|
24
|
37
|
27
|
19
|
43
|
31
|
25
|
16
|
22
|
22
|
13
|
27
|
42
|
28
|
18
|
25
|
38
|
35
|
25
|
20
|
38
|
36
|
|
|
2025/08
|
26
|
25
|
24
|
35
|
34
|
29
|
31
|
30
|
20
|
23
|
20
|
21
|
26
|
29
|
31
|
25
|
32
|
33
|
34
|
24
|
26
|
28
|
20
|
34
|
38
|
36
|
33
|
36
|
31
|
38
|
23
|
|
2025/07
|
24
|
30
|
20
|
25
|
31
|
35
|
39
|
34
|
23
|
50
|
55
|
37
|
40
|
41
|
40
|
42
|
35
|
35
|
44
|
33
|
21
|
24
|
23
|
28
|
29
|
29
|
27
|
27
|
19
|
33
|
35
|
|
2025/06
|
48
|
48
|
58
|
69
|
65
|
63
|
70
|
84
|
60
|
59
|
58
|
47
|
44
|
53
|
48
|
47
|
49
|
44
|
21
|
30
|
46
|
35
|
43
|
46
|
59
|
29
|
32
|
23
|
12
|
17
|
|
|
2025/05
|
56
|
84
|
49
|
51
|
88
|
104
|
74
|
64
|
36
|
28
|
52
|
54
|
54
|
59
|
62
|
82
|
117
|
70
|
85
|
65
|
61
|
64
|
65
|
56
|
50
|
53
|
58
|
58
|
56
|
64
|
70
|
|
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