Air Quality
Excellent
No health implications.
9
PM2.5
20
PM10
66
O3
0.3
CO
5
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
28 Mar
52
Good
Sat
29 Mar
55
Good
Sun
30 Mar
56
Good
Mon
31 Mar
75
Good
Tue
1 Apr
85
Good
Wed
2 Apr
82
Good
Thu
3 Apr
46
Excellent
Air quality in the last 12 months (Yi'an)
|
2025/02
|
64
|
131
|
82
|
26
|
45
|
52
|
21
|
17
|
25
|
39
|
72
|
64
|
44
|
28
|
32
|
31
|
23
|
21
|
25
|
28
|
31
|
33
|
30
|
33
|
38
|
22
|
46
|
30
|
|||
|
2025/01
|
115
|
76
|
62
|
129
|
105
|
64
|
51
|
34
|
35
|
55
|
87
|
168
|
190
|
132
|
36
|
38
|
76
|
142
|
171
|
130
|
99
|
67
|
165
|
231
|
230
|
165
|
40
|
44
|
48
|
31
|
41
|
|
2024/12
|
45
|
19
|
23
|
20
|
28
|
19
|
27
|
33
|
100
|
77
|
25
|
43
|
68
|
43
|
31
|
26
|
34
|
38
|
54
|
93
|
44
|
29
|
34
|
42
|
46
|
28
|
31
|
36
|
53
|
91
|
105
|
|
2024/11
|
51
|
60
|
49
|
28
|
40
|
66
|
132
|
138
|
204
|
116
|
217
|
72
|
156
|
267
|
171
|
56
|
20
|
26
|
56
|
106
|
78
|
26
|
53
|
131
|
159
|
68
|
23
|
41
|
24
|
31
|
|
|
2024/10
|
19
|
19
|
22
|
31
|
36
|
32
|
60
|
44
|
43
|
28
|
22
|
20
|
41
|
48
|
13
|
21
|
31
|
29
|
17
|
35
|
37
|
43
|
38
|
58
|
49
|
83
|
55
|
43
|
66
|
69
|
75
|
|
2024/09
|
13
|
17
|
18
|
25
|
13
|
16
|
19
|
18
|
33
|
21
|
14
|
24
|
13
|
18
|
21
|
21
|
19
|
19
|
15
|
19
|
21
|
20
|
24
|
27
|
21
|
26
|
28
|
22
|
37
|
18
|
|
|
2024/08
|
21
|
20
|
19
|
21
|
21
|
23
|
25
|
17
|
29
|
29
|
16
|
14
|
18
|
20
|
23
|
27
|
30
|
27
|
20
|
22
|
21
|
21
|
25
|
23
|
25
|
15
|
16
|
19
|
22
|
14
|
14
|
|
2024/07
|
41
|
45
|
54
|
49
|
51
|
54
|
74
|
85
|
67
|
81
|
89
|
74
|
89
|
71
|
55
|
45
|
21
|
29
|
26
|
28
|
17
|
19
|
21
|
17
|
23
|
19
|
13
|
19
|
18
|
20
|
24
|
|
2024/06
|
25
|
29
|
30
|
18
|
31
|
39
|
27
|
16
|
16
|
21
|
23
|
21
|
26
|
20
|
16
|
22
|
16
|
18
|
31
|
23
|
15
|
18
|
17
|
22
|
30
|
34
|
36
|
46
|
35
|
44
|
|
|
2024/05
|
44
|
38
|
47
|
64
|
45
|
36
|
33
|
58
|
24
|
27
|
20
|
38
|
28
|
17
|
16
|
22
|
39
|
22
|
26
|
26
|
38
|
35
|
16
|
22
|
27
|
24
|
27
|
31
|
20
|
17
|
24
|
|
2024/04
|
25
|
62
|
44
|
26
|
50
|
36
|
34
|
31
|
51
|
94
|
104
|
90
|
67
|
84
|
92
|
38
|
38
|
37
|
21
|
86
|
186
|
130
|
23
|
32
|
32
|
15
|
19
|
16
|
30
|
35
|
|
|
2024/03
|
26
|
28
|
31
|
30
|
30
|
29
|
39
|
25
|
32
|
46
|
36
|
37
|
39
|
43
|
28
|
46
|
20
|
23
|
32
|
27
|
30
|
40
|
63
|
19
|
32
|
61
|
73
|
151
|
23
|
21
|
22
|
|
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