Air Quality
Excellent
No health implications.
18
PM2.5
38
PM10
128
O3
0.4
CO
7
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
25 May
73
Good
Mon
26 May
77
Good
Tue
27 May
76
Good
Wed
28 May
73
Good
Thu
29 May
104
Light
Fri
30 May
87
Good
Sat
31 May
42
Excellent
Air quality in the last 12 months (Huan County)
|
2025/04
|
66
|
69
|
103
|
122
|
77
|
97
|
75
|
120
|
111
|
64
|
226
|
222
|
137
|
46
|
67
|
208
|
98
|
139
|
113
|
87
|
177
|
108
|
64
|
57
|
61
|
53
|
51
|
39
|
77
|
205
|
|
|
2025/03
|
79
|
42
|
38
|
38
|
51
|
44
|
72
|
73
|
126
|
64
|
278
|
151
|
87
|
50
|
63
|
41
|
42
|
34
|
44
|
58
|
59
|
67
|
159
|
249
|
180
|
392
|
150
|
117
|
52
|
62
|
60
|
|
2025/02
|
69
|
40
|
36
|
41
|
39
|
79
|
60
|
45
|
55
|
55
|
84
|
64
|
54
|
53
|
60
|
91
|
73
|
67
|
49
|
54
|
58
|
47
|
29
|
46
|
63
|
57
|
57
|
62
|
|||
|
2025/01
|
61
|
56
|
63
|
82
|
64
|
36
|
45
|
41
|
48
|
53
|
84
|
87
|
188
|
42
|
42
|
49
|
55
|
59
|
57
|
49
|
67
|
72
|
138
|
173
|
80
|
87
|
65
|
74
|
98
|
62
|
43
|
|
2024/12
|
43
|
44
|
58
|
44
|
42
|
39
|
36
|
34
|
58
|
55
|
68
|
58
|
56
|
43
|
53
|
53
|
66
|
42
|
56
|
49
|
36
|
48
|
57
|
81
|
67
|
60
|
38
|
45
|
63
|
57
|
52
|
|
2024/11
|
35
|
32
|
50
|
46
|
56
|
60
|
67
|
60
|
68
|
57
|
59
|
49
|
49
|
38
|
72
|
46
|
40
|
30
|
36
|
54
|
56
|
44
|
69
|
47
|
49
|
64
|
68
|
54
|
32
|
37
|
|
|
2024/10
|
50
|
38
|
43
|
30
|
45
|
45
|
39
|
52
|
53
|
50
|
49
|
47
|
46
|
50
|
50
|
55
|
43
|
34
|
16
|
36
|
24
|
30
|
39
|
42
|
51
|
51
|
41
|
38
|
45
|
31
|
36
|
|
2024/09
|
47
|
31
|
30
|
42
|
24
|
26
|
26
|
37
|
44
|
35
|
30
|
36
|
25
|
28
|
30
|
27
|
35
|
40
|
45
|
39
|
30
|
33
|
44
|
54
|
33
|
45
|
64
|
66
|
37
|
45
|
|
|
2024/08
|
25
|
30
|
23
|
23
|
27
|
22
|
13
|
19
|
94
|
203
|
40
|
34
|
35
|
29
|
43
|
34
|
32
|
26
|
28
|
30
|
32
|
37
|
39
|
39
|
34
|
23
|
20
|
30
|
36
|
37
|
48
|
|
2024/07
|
30
|
31
|
30
|
31
|
65
|
48
|
25
|
37
|
35
|
31
|
28
|
55
|
44
|
38
|
28
|
18
|
23
|
26
|
18
|
28
|
161
|
48
|
26
|
180
|
64
|
40
|
40
|
32
|
23
|
29
|
36
|
|
2024/06
|
50
|
22
|
25
|
37
|
34
|
29
|
29
|
39
|
26
|
27
|
38
|
47
|
47
|
49
|
45
|
34
|
28
|
28
|
33
|
38
|
27
|
60
|
62
|
104
|
68
|
57
|
31
|
45
|
48
|
25
|
|
|
2024/05
|
32
|
33
|
25
|
24
|
41
|
52
|
47
|
49
|
29
|
98
|
93
|
45
|
45
|
57
|
67
|
61
|
70
|
53
|
72
|
53
|
46
|
48
|
39
|
46
|
49
|
42
|
31
|
46
|
51
|
56
|
47
|
|
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