Air Quality
Excellent
No health implications.
4
PM2.5
6
PM10
38
O3
0.5
CO
8
SO2
6
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
24 May
49
Excellent
Mon
25 May
48
Excellent
Tue
26 May
51
Good
Wed
27 May
57
Good
Thu
28 May
70
Good
Fri
29 May
77
Good
Sat
30 May
47
Excellent
Air quality in the last 12 months (Yi'an)
|
2026/04
|
71
|
60
|
42
|
69
|
72
|
69
|
57
|
39
|
37
|
53
|
62
|
38
|
48
|
42
|
47
|
60
|
71
|
65
|
60
|
57
|
41
|
16
|
20
|
40
|
46
|
46
|
56
|
37
|
30
|
40
|
|
|
2026/03
|
37
|
22
|
59
|
61
|
59
|
61
|
67
|
59
|
62
|
73
|
60
|
64
|
73
|
62
|
97
|
49
|
28
|
32
|
81
|
95
|
61
|
52
|
71
|
42
|
62
|
81
|
80
|
48
|
57
|
48
|
81
|
|
2026/02
|
47
|
64
|
79
|
75
|
84
|
59
|
46
|
54
|
48
|
67
|
89
|
78
|
68
|
62
|
69
|
38
|
107
|
87
|
77
|
53
|
43
|
98
|
125
|
27
|
44
|
26
|
35
|
37
|
|||
|
2026/01
|
31
|
63
|
79
|
87
|
83
|
78
|
59
|
57
|
57
|
90
|
78
|
57
|
69
|
65
|
79
|
92
|
151
|
117
|
35
|
46
|
58
|
53
|
68
|
80
|
134
|
56
|
50
|
93
|
72
|
25
|
32
|
|
2025/12
|
112
|
85
|
75
|
65
|
76
|
76
|
75
|
106
|
62
|
84
|
112
|
62
|
47
|
59
|
53
|
63
|
130
|
142
|
129
|
176
|
43
|
40
|
44
|
64
|
79
|
41
|
53
|
64
|
70
|
130
|
42
|
|
2025/11
|
73
|
66
|
53
|
59
|
65
|
47
|
21
|
31
|
43
|
67
|
40
|
39
|
51
|
78
|
90
|
112
|
50
|
34
|
39
|
48
|
71
|
87
|
93
|
81
|
91
|
67
|
139
|
90
|
72
|
67
|
|
|
2025/10
|
34
|
48
|
33
|
45
|
70
|
54
|
74
|
54
|
46
|
62
|
81
|
68
|
45
|
47
|
66
|
52
|
46
|
19
|
25
|
31
|
26
|
32
|
38
|
42
|
55
|
57
|
60
|
69
|
66
|
53
|
58
|
|
2025/09
|
26
|
27
|
32
|
43
|
45
|
42
|
57
|
50
|
31
|
30
|
27
|
24
|
27
|
37
|
28
|
34
|
32
|
36
|
38
|
29
|
36
|
35
|
52
|
19
|
32
|
61
|
53
|
54
|
50
|
43
|
|
|
2025/08
|
20
|
20
|
28
|
33
|
39
|
20
|
16
|
21
|
25
|
30
|
17
|
45
|
51
|
24
|
25
|
26
|
31
|
35
|
36
|
27
|
26
|
23
|
24
|
28
|
34
|
25
|
36
|
35
|
50
|
37
|
25
|
|
2025/07
|
25
|
28
|
32
|
33
|
41
|
47
|
39
|
22
|
19
|
32
|
35
|
26
|
35
|
48
|
40
|
33
|
25
|
50
|
32
|
19
|
20
|
14
|
21
|
25
|
26
|
25
|
23
|
25
|
26
|
25
|
24
|
|
2025/06
|
15
|
18
|
45
|
50
|
52
|
41
|
28
|
18
|
46
|
37
|
36
|
36
|
49
|
28
|
19
|
40
|
43
|
21
|
14
|
20
|
17
|
20
|
28
|
45
|
43
|
38
|
25
|
14
|
24
|
21
|
|
|
2025/05
|
53
|
53
|
55
|
45
|
49
|
156
|
121
|
52
|
31
|
37
|
44
|
44
|
47
|
56
|
60
|
40
|
44
|
89
|
59
|
35
|
28
|
36
|
42
|
74
|
62
|
60
|
65
|
60
|
45
|
40
|
32
|
|
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