Air Quality
Excellent
No health implications.
34
PM2.5
50
PM10
19
O3
0.5
CO
12
SO2
35
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
13 May
56
Good
Thu
14 May
56
Good
Fri
15 May
54
Good
Sat
16 May
54
Good
Sun
17 May
56
Good
Mon
18 May
52
Good
Tue
19 May
39
Excellent
Air quality in the last 12 months (Sihui)
|
2026/04
|
27
|
43
|
45
|
25
|
48
|
49
|
51
|
47
|
45
|
39
|
41
|
45
|
36
|
38
|
29
|
32
|
31
|
35
|
58
|
41
|
35
|
34
|
21
|
29
|
38
|
72
|
48
|
36
|
27
|
25
|
|
|
2026/03
|
23
|
30
|
11
|
13
|
21
|
26
|
35
|
56
|
41
|
16
|
34
|
34
|
52
|
58
|
52
|
45
|
43
|
41
|
47
|
40
|
36
|
46
|
51
|
51
|
64
|
40
|
38
|
39
|
36
|
37
|
36
|
|
2026/02
|
29
|
33
|
47
|
64
|
53
|
37
|
31
|
34
|
47
|
57
|
42
|
33
|
44
|
39
|
24
|
28
|
38
|
33
|
43
|
46
|
47
|
37
|
48
|
51
|
37
|
35
|
33
|
19
|
|||
|
2026/01
|
58
|
19
|
37
|
59
|
41
|
38
|
38
|
29
|
34
|
46
|
37
|
59
|
56
|
74
|
74
|
94
|
133
|
125
|
93
|
60
|
25
|
24
|
32
|
44
|
69
|
75
|
50
|
45
|
57
|
57
|
27
|
|
2025/12
|
41
|
31
|
62
|
63
|
64
|
69
|
73
|
56
|
57
|
63
|
57
|
57
|
38
|
21
|
38
|
54
|
39
|
40
|
72
|
45
|
53
|
77
|
77
|
67
|
17
|
37
|
41
|
48
|
56
|
46
|
62
|
|
2025/11
|
28
|
32
|
22
|
11
|
13
|
24
|
34
|
47
|
18
|
9
|
11
|
17
|
21
|
28
|
37
|
41
|
43
|
32
|
21
|
25
|
28
|
32
|
45
|
40
|
35
|
46
|
43
|
49
|
55
|
56
|
|
|
2025/10
|
43
|
25
|
25
|
35
|
17
|
22
|
33
|
32
|
44
|
46
|
47
|
36
|
25
|
26
|
45
|
50
|
47
|
49
|
27
|
14
|
12
|
11
|
15
|
31
|
36
|
44
|
43
|
45
|
50
|
45
|
31
|
|
2025/09
|
28
|
26
|
25
|
26
|
27
|
30
|
26
|
12
|
17
|
22
|
29
|
19
|
27
|
27
|
29
|
25
|
31
|
28
|
27
|
20
|
14
|
22
|
19
|
10
|
18
|
25
|
34
|
35
|
41
|
35
|
|
|
2025/08
|
23
|
26
|
29
|
35
|
25
|
20
|
32
|
35
|
35
|
26
|
29
|
27
|
27
|
28
|
14
|
20
|
26
|
16
|
22
|
21
|
24
|
30
|
40
|
28
|
24
|
28
|
35
|
31
|
29
|
24
|
28
|
|
2025/07
|
19
|
28
|
34
|
39
|
43
|
39
|
35
|
27
|
28
|
24
|
18
|
31
|
26
|
33
|
33
|
33
|
37
|
37
|
27
|
13
|
16
|
16
|
22
|
21
|
18
|
22
|
37
|
37
|
27
|
30
|
23
|
|
2025/06
|
41
|
36
|
18
|
37
|
44
|
39
|
32
|
26
|
33
|
39
|
25
|
25
|
20
|
21
|
20
|
31
|
22
|
23
|
24
|
25
|
24
|
23
|
24
|
25
|
27
|
23
|
19
|
21
|
26
|
24
|
|
|
2025/05
|
32
|
49
|
43
|
32
|
33
|
32
|
26
|
30
|
23
|
37
|
33
|
42
|
52
|
43
|
31
|
24
|
31
|
24
|
34
|
33
|
31
|
33
|
28
|
22
|
39
|
46
|
55
|
60
|
33
|
23
|
40
|
|
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