Air Quality
Excellent
No health implications.
6
PM2.5
10
PM10
35
O3
0.4
CO
5
SO2
26
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 May
52
Good
Wed
20 May
51
Good
Thu
21 May
52
Good
Fri
22 May
53
Good
Sat
23 May
54
Good
Sun
24 May
64
Good
Mon
25 May
46
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