Air Quality
Excellent
No health implications.
4
PM2.5
18
PM10
57
O3
0.6
CO
5
SO2
13
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 May
76
Good
Thu
22 May
58
Good
Fri
23 May
53
Good
Sat
24 May
84
Good
Sun
25 May
89
Good
Mon
26 May
89
Good
Tue
27 May
45
Excellent
Air quality in the last 12 months (Yi'an)
|
2025/04
|
45
|
62
|
56
|
65
|
76
|
61
|
60
|
66
|
65
|
63
|
62
|
184
|
109
|
88
|
48
|
49
|
64
|
67
|
82
|
70
|
60
|
59
|
67
|
71
|
60
|
48
|
42
|
68
|
73
|
55
|
|
|
2025/03
|
41
|
35
|
21
|
45
|
59
|
59
|
58
|
61
|
77
|
68
|
52
|
74
|
50
|
43
|
33
|
49
|
32
|
50
|
43
|
47
|
46
|
51
|
61
|
60
|
60
|
64
|
82
|
69
|
78
|
75
|
47
|
|
2025/02
|
47
|
59
|
96
|
83
|
51
|
49
|
71
|
32
|
37
|
45
|
64
|
91
|
64
|
78
|
95
|
81
|
72
|
45
|
56
|
54
|
32
|
52
|
73
|
75
|
74
|
96
|
70
|
49
|
|||
|
2025/01
|
106
|
113
|
153
|
107
|
107
|
77
|
50
|
61
|
48
|
41
|
61
|
71
|
69
|
88
|
58
|
47
|
65
|
74
|
75
|
117
|
124
|
136
|
159
|
62
|
41
|
54
|
44
|
65
|
127
|
76
|
88
|
|
2024/12
|
60
|
65
|
107
|
69
|
64
|
80
|
110
|
56
|
59
|
66
|
67
|
75
|
79
|
65
|
61
|
61
|
77
|
87
|
43
|
62
|
99
|
58
|
66
|
78
|
105
|
126
|
73
|
93
|
64
|
87
|
85
|
|
2024/11
|
34
|
60
|
49
|
62
|
51
|
51
|
45
|
47
|
56
|
50
|
58
|
59
|
52
|
71
|
87
|
96
|
34
|
33
|
40
|
49
|
49
|
62
|
54
|
53
|
45
|
48
|
63
|
58
|
48
|
58
|
|
|
2024/10
|
32
|
37
|
35
|
40
|
38
|
29
|
16
|
47
|
45
|
56
|
64
|
70
|
68
|
55
|
54
|
48
|
34
|
41
|
30
|
40
|
52
|
41
|
58
|
55
|
53
|
30
|
22
|
69
|
64
|
51
|
43
|
|
2024/09
|
47
|
50
|
44
|
48
|
45
|
37
|
50
|
53
|
36
|
41
|
23
|
19
|
33
|
52
|
42
|
37
|
31
|
37
|
34
|
27
|
32
|
33
|
36
|
42
|
51
|
72
|
36
|
44
|
46
|
47
|
|
|
2024/08
|
22
|
24
|
31
|
33
|
33
|
35
|
30
|
35
|
42
|
41
|
44
|
41
|
34
|
23
|
34
|
42
|
46
|
45
|
44
|
23
|
38
|
35
|
39
|
48
|
49
|
53
|
33
|
19
|
37
|
40
|
44
|
|
2024/07
|
17
|
19
|
24
|
22
|
23
|
24
|
23
|
24
|
30
|
29
|
39
|
37
|
19
|
13
|
33
|
42
|
30
|
24
|
24
|
23
|
28
|
30
|
41
|
42
|
31
|
29
|
19
|
15
|
24
|
28
|
29
|
|
2024/06
|
32
|
41
|
36
|
48
|
39
|
33
|
37
|
38
|
51
|
22
|
31
|
36
|
40
|
48
|
51
|
51
|
38
|
38
|
23
|
25
|
31
|
16
|
22
|
38
|
29
|
31
|
24
|
15
|
27
|
20
|
|
|
2024/05
|
34
|
40
|
49
|
47
|
42
|
44
|
51
|
56
|
47
|
58
|
52
|
97
|
76
|
57
|
68
|
43
|
55
|
62
|
59
|
62
|
48
|
40
|
57
|
60
|
49
|
29
|
33
|
33
|
40
|
44
|
40
|
|
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