Air Quality
Excellent
No health implications.
8
PM2.5
16
PM10
17
O3
0.3
CO
2
SO2
18
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
3 May
66
Good
Mon
4 May
70
Good
Tue
5 May
95
Good
Wed
6 May
86
Good
Thu
7 May
61
Good
Fri
8 May
47
Excellent
Sat
9 May
38
Excellent
Air quality in the last 12 months (Yi County)
|
2026/03
|
83
|
114
|
121
|
108
|
68
|
52
|
78
|
111
|
51
|
108
|
76
|
103
|
148
|
86
|
69
|
65
|
149
|
52
|
61
|
80
|
89
|
68
|
111
|
154
|
143
|
184
|
72
|
84
|
78
|
44
|
59
|
|
2026/02
|
142
|
76
|
108
|
117
|
73
|
31
|
51
|
63
|
106
|
125
|
75
|
92
|
111
|
115
|
41
|
62
|
96
|
49
|
86
|
111
|
229
|
49
|
44
|
73
|
101
|
91
|
54
|
70
|
|||
|
2026/01
|
59
|
84
|
122
|
102
|
85
|
91
|
53
|
78
|
96
|
33
|
38
|
78
|
66
|
76
|
135
|
92
|
36
|
42
|
27
|
49
|
59
|
64
|
87
|
126
|
67
|
101
|
104
|
74
|
86
|
116
|
143
|
|
2025/12
|
51
|
33
|
55
|
55
|
82
|
108
|
65
|
42
|
70
|
99
|
90
|
37
|
51
|
66
|
90
|
76
|
138
|
180
|
215
|
96
|
47
|
79
|
78
|
53
|
31
|
68
|
80
|
116
|
88
|
56
|
28
|
|
2025/11
|
55
|
34
|
61
|
92
|
166
|
173
|
58
|
71
|
58
|
63
|
96
|
145
|
63
|
73
|
95
|
46
|
24
|
42
|
57
|
58
|
62
|
71
|
97
|
100
|
41
|
105
|
37
|
79
|
108
|
137
|
|
|
2025/10
|
60
|
46
|
56
|
66
|
56
|
30
|
49
|
27
|
10
|
11
|
18
|
36
|
45
|
46
|
71
|
71
|
39
|
13
|
21
|
25
|
34
|
48
|
77
|
110
|
144
|
47
|
48
|
104
|
162
|
182
|
117
|
|
2025/09
|
45
|
47
|
45
|
46
|
46
|
34
|
49
|
40
|
53
|
50
|
60
|
52
|
54
|
52
|
45
|
31
|
24
|
24
|
27
|
49
|
57
|
32
|
49
|
58
|
58
|
57
|
47
|
56
|
48
|
62
|
|
|
2025/08
|
42
|
54
|
47
|
31
|
33
|
53
|
35
|
25
|
21
|
31
|
40
|
45
|
23
|
45
|
46
|
25
|
34
|
42
|
26
|
20
|
32
|
32
|
20
|
18
|
25
|
33
|
18
|
22
|
35
|
28
|
36
|
|
2025/07
|
30
|
36
|
22
|
34
|
16
|
23
|
34
|
27
|
41
|
24
|
49
|
50
|
22
|
42
|
45
|
38
|
23
|
34
|
55
|
24
|
21
|
36
|
34
|
26
|
23
|
42
|
46
|
29
|
13
|
20
|
33
|
|
2025/06
|
74
|
51
|
22
|
34
|
55
|
52
|
46
|
54
|
62
|
39
|
65
|
84
|
72
|
38
|
20
|
24
|
59
|
74
|
38
|
42
|
36
|
40
|
58
|
52
|
63
|
65
|
58
|
58
|
45
|
52
|
|
|
2025/05
|
44
|
62
|
31
|
53
|
56
|
45
|
70
|
93
|
30
|
40
|
55
|
68
|
82
|
39
|
50
|
67
|
75
|
58
|
68
|
91
|
75
|
64
|
58
|
41
|
53
|
60
|
67
|
67
|
70
|
70
|
65
|
|
2025/04
|
52
|
26
|
65
|
81
|
36
|
80
|
84
|
53
|
60
|
71
|
150
|
106
|
53
|
35
|
58
|
87
|
94
|
49
|
48
|
73
|
78
|
49
|
63
|
51
|
64
|
92
|
76
|
58
|
70
|
58
|
|
|
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