Air Quality
Excellent
No health implications.
11
PM2.5
20
PM10
51
O3
0.6
CO
3
SO2
17
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 Jan
71
Good
Tue
20 Jan
53
Good
Wed
21 Jan
50
Excellent
Thu
22 Jan
50
Excellent
Fri
23 Jan
76
Good
Sat
24 Jan
83
Good
Sun
25 Jan
38
Excellent
Yi County Air quality rank
Air quality in the last 12 months (Yi County)
|
2025/11
|
35
|
41
|
53
|
47
|
28
|
20
|
19
|
17
|
14
|
39
|
38
|
27
|
37
|
40
|
50
|
59
|
42
|
31
|
36
|
38
|
42
|
47
|
47
|
57
|
83
|
62
|
97
|
83
|
57
|
49
|
|
|
2025/10
|
27
|
33
|
33
|
33
|
36
|
33
|
41
|
47
|
39
|
33
|
41
|
47
|
39
|
30
|
33
|
26
|
29
|
15
|
12
|
18
|
19
|
27
|
28
|
30
|
37
|
46
|
34
|
46
|
48
|
32
|
23
|
|
2025/09
|
17
|
21
|
25
|
28
|
31
|
24
|
27
|
30
|
15
|
17
|
19
|
21
|
21
|
21
|
24
|
30
|
30
|
26
|
25
|
18
|
18
|
23
|
28
|
16
|
18
|
24
|
32
|
36
|
39
|
34
|
|
|
2025/08
|
23
|
27
|
26
|
25
|
21
|
14
|
16
|
20
|
23
|
32
|
32
|
23
|
19
|
17
|
16
|
18
|
21
|
25
|
24
|
21
|
19
|
17
|
21
|
27
|
28
|
17
|
23
|
21
|
25
|
28
|
21
|
|
2025/07
|
18
|
20
|
22
|
25
|
28
|
26
|
21
|
16
|
14
|
21
|
20
|
15
|
15
|
24
|
24
|
25
|
26
|
27
|
18
|
9
|
10
|
8
|
11
|
14
|
19
|
17
|
14
|
17
|
15
|
16
|
12
|
|
2025/06
|
9
|
11
|
17
|
26
|
29
|
28
|
27
|
14
|
13
|
17
|
12
|
17
|
21
|
13
|
11
|
26
|
31
|
15
|
14
|
16
|
13
|
8
|
11
|
18
|
21
|
20
|
19
|
14
|
16
|
20
|
|
|
2025/05
|
42
|
46
|
50
|
51
|
22
|
84
|
116
|
39
|
15
|
35
|
33
|
37
|
35
|
40
|
50
|
26
|
20
|
57
|
30
|
19
|
15
|
22
|
16
|
59
|
52
|
48
|
47
|
41
|
20
|
24
|
28
|
|
2025/04
|
28
|
41
|
60
|
52
|
58
|
52
|
50
|
51
|
56
|
51
|
44
|
133
|
108
|
99
|
44
|
40
|
54
|
56
|
56
|
58
|
37
|
21
|
40
|
33
|
34
|
38
|
21
|
37
|
50
|
46
|
|
|
2025/03
|
36
|
38
|
14
|
22
|
35
|
51
|
49
|
48
|
62
|
52
|
45
|
36
|
21
|
30
|
13
|
46
|
30
|
38
|
39
|
36
|
41
|
45
|
53
|
55
|
54
|
61
|
50
|
60
|
44
|
60
|
38
|
|
2025/02
|
24
|
21
|
66
|
46
|
39
|
45
|
70
|
38
|
32
|
38
|
54
|
72
|
95
|
84
|
59
|
46
|
54
|
34
|
34
|
22
|
17
|
21
|
45
|
66
|
59
|
44
|
38
|
32
|
|||
|
2025/01
|
74
|
65
|
90
|
74
|
74
|
59
|
62
|
52
|
53
|
34
|
41
|
62
|
58
|
57
|
78
|
40
|
45
|
45
|
50
|
62
|
61
|
62
|
85
|
77
|
42
|
29
|
42
|
67
|
143
|
70
|
45
|
|
2024/12
|
43
|
48
|
70
|
71
|
36
|
41
|
69
|
65
|
47
|
47
|
23
|
59
|
73
|
69
|
52
|
42
|
49
|
65
|
47
|
45
|
66
|
67
|
62
|
68
|
77
|
88
|
96
|
81
|
52
|
62
|
73
|
|
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