Air Quality
Excellent
No health implications.
13
PM2.5
16
PM10
45
O3
0.7
CO
6
SO2
16
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
18 May
38
Excellent
Tue
19 May
39
Excellent
Wed
20 May
47
Excellent
Thu
21 May
65
Good
Fri
22 May
68
Good
Sat
23 May
86
Good
Sun
24 May
34
Excellent
Air quality in the last 12 months (Changyi)
|
2026/04
|
74
|
72
|
80
|
38
|
64
|
38
|
37
|
47
|
35
|
63
|
65
|
64
|
45
|
71
|
79
|
57
|
61
|
70
|
72
|
85
|
68
|
34
|
44
|
54
|
58
|
64
|
77
|
37
|
45
|
51
|
|
|
2026/03
|
109
|
126
|
142
|
105
|
82
|
43
|
36
|
53
|
62
|
82
|
110
|
63
|
74
|
90
|
56
|
74
|
63
|
39
|
43
|
91
|
112
|
107
|
137
|
107
|
92
|
96
|
95
|
106
|
114
|
70
|
50
|
|
2026/02
|
200
|
152
|
97
|
140
|
154
|
36
|
42
|
54
|
66
|
68
|
133
|
111
|
109
|
120
|
70
|
64
|
212
|
76
|
78
|
75
|
84
|
106
|
59
|
52
|
69
|
62
|
81
|
84
|
|||
|
2026/01
|
38
|
41
|
90
|
196
|
101
|
135
|
67
|
50
|
84
|
81
|
39
|
71
|
74
|
86
|
159
|
117
|
40
|
32
|
31
|
34
|
41
|
55
|
98
|
147
|
77
|
76
|
94
|
123
|
105
|
49
|
122
|
|
2025/12
|
60
|
31
|
47
|
52
|
46
|
105
|
108
|
49
|
91
|
87
|
58
|
27
|
50
|
65
|
77
|
104
|
62
|
68
|
124
|
84
|
34
|
47
|
53
|
72
|
32
|
38
|
65
|
110
|
127
|
58
|
32
|
|
2025/11
|
86
|
39
|
31
|
56
|
63
|
50
|
82
|
86
|
86
|
60
|
75
|
82
|
75
|
73
|
149
|
104
|
37
|
50
|
56
|
61
|
63
|
100
|
121
|
138
|
43
|
80
|
111
|
105
|
133
|
158
|
|
|
2025/10
|
53
|
22
|
14
|
31
|
8
|
11
|
36
|
36
|
25
|
12
|
21
|
21
|
29
|
54
|
25
|
42
|
42
|
22
|
26
|
27
|
32
|
33
|
40
|
45
|
67
|
75
|
44
|
68
|
51
|
39
|
47
|
|
2025/09
|
28
|
38
|
33
|
32
|
31
|
34
|
49
|
63
|
54
|
51
|
37
|
27
|
34
|
48
|
47
|
30
|
17
|
22
|
14
|
35
|
44
|
39
|
42
|
36
|
51
|
59
|
45
|
38
|
72
|
76
|
|
|
2025/08
|
12
|
22
|
16
|
23
|
30
|
22
|
27
|
29
|
8
|
17
|
28
|
31
|
31
|
33
|
24
|
25
|
14
|
34
|
37
|
37
|
36
|
34
|
31
|
27
|
44
|
22
|
27
|
23
|
18
|
16
|
15
|
|
2025/07
|
33
|
30
|
33
|
31
|
35
|
35
|
42
|
20
|
25
|
35
|
41
|
33
|
40
|
25
|
25
|
22
|
26
|
28
|
32
|
24
|
16
|
15
|
15
|
18
|
24
|
23
|
23
|
20
|
20
|
23
|
22
|
|
2025/06
|
47
|
34
|
42
|
33
|
52
|
59
|
59
|
47
|
53
|
22
|
30
|
36
|
24
|
19
|
26
|
35
|
39
|
49
|
21
|
17
|
35
|
50
|
45
|
39
|
53
|
64
|
51
|
49
|
20
|
24
|
|
|
2025/05
|
66
|
53
|
40
|
43
|
31
|
44
|
53
|
48
|
27
|
38
|
51
|
63
|
60
|
63
|
39
|
61
|
63
|
47
|
76
|
76
|
62
|
61
|
40
|
53
|
42
|
56
|
49
|
50
|
49
|
52
|
57
|
|
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