Air Quality
Excellent
No health implications.
6
PM2.5
21
PM10
108
O3
0.4
CO
10
SO2
8
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
18 Jun
82
Good
Thu
19 Jun
56
Good
Fri
20 Jun
53
Good
Sat
21 Jun
48
Excellent
Sun
22 Jun
50
Excellent
Mon
23 Jun
52
Good
Tue
24 Jun
32
Excellent
Air quality in the last 12 months (Yi'an)
|
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
|
|
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
|
|
|
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