Air Quality
Excellent
No health implications.
30
PM2.5
39
PM10
61
O3
0.7
CO
12
SO2
19
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 May
70
Good
Fri
22 May
69
Good
Sat
23 May
69
Good
Sun
24 May
69
Good
Mon
25 May
68
Good
Tue
26 May
64
Good
Wed
27 May
49
Excellent
Air quality in the last 12 months (Huidong)
|
2026/04
|
33
|
34
|
29
|
33
|
41
|
37
|
33
|
37
|
32
|
35
|
35
|
35
|
41
|
47
|
54
|
49
|
37
|
39
|
51
|
40
|
43
|
44
|
35
|
40
|
39
|
46
|
34
|
27
|
27
|
34
|
|
|
2026/03
|
50
|
44
|
44
|
33
|
52
|
62
|
67
|
54
|
25
|
29
|
51
|
54
|
35
|
30
|
23
|
33
|
35
|
28
|
37
|
35
|
39
|
40
|
30
|
32
|
37
|
33
|
36
|
41
|
33
|
28
|
28
|
|
2026/02
|
48
|
41
|
41
|
37
|
34
|
36
|
50
|
39
|
36
|
35
|
32
|
38
|
37
|
36
|
36
|
56
|
104
|
59
|
42
|
41
|
39
|
45
|
44
|
46
|
49
|
55
|
47
|
45
|
|||
|
2026/01
|
50
|
38
|
33
|
30
|
35
|
37
|
39
|
42
|
72
|
63
|
55
|
45
|
52
|
53
|
54
|
48
|
66
|
60
|
65
|
55
|
47
|
52
|
72
|
59
|
55
|
52
|
67
|
76
|
54
|
37
|
42
|
|
2025/12
|
61
|
57
|
44
|
42
|
39
|
48
|
43
|
51
|
47
|
48
|
59
|
48
|
52
|
56
|
51
|
56
|
51
|
61
|
55
|
55
|
48
|
45
|
54
|
50
|
39
|
61
|
63
|
61
|
61
|
50
|
52
|
|
2025/11
|
21
|
16
|
14
|
32
|
34
|
31
|
30
|
32
|
25
|
25
|
28
|
30
|
30
|
33
|
34
|
37
|
38
|
32
|
19
|
37
|
41
|
40
|
42
|
41
|
44
|
52
|
44
|
51
|
56
|
62
|
|
|
2025/10
|
17
|
19
|
23
|
22
|
23
|
23
|
19
|
17
|
20
|
24
|
24
|
24
|
27
|
28
|
26
|
24
|
19
|
20
|
22
|
23
|
19
|
19
|
27
|
34
|
38
|
25
|
26
|
33
|
32
|
34
|
33
|
|
2025/09
|
28
|
27
|
27
|
28
|
24
|
24
|
28
|
31
|
24
|
31
|
23
|
23
|
25
|
29
|
27
|
24
|
21
|
20
|
20
|
29
|
26
|
25
|
19
|
21
|
36
|
24
|
24
|
23
|
21
|
18
|
|
|
2025/08
|
28
|
30
|
31
|
30
|
28
|
27
|
32
|
25
|
25
|
22
|
21
|
21
|
27
|
36
|
37
|
26
|
20
|
26
|
26
|
25
|
26
|
18
|
17
|
18
|
22
|
25
|
25
|
24
|
29
|
31
|
27
|
|
2025/07
|
22
|
17
|
21
|
21
|
23
|
21
|
27
|
23
|
19
|
25
|
21
|
25
|
28
|
32
|
32
|
32
|
34
|
36
|
22
|
27
|
20
|
18
|
16
|
21
|
18
|
20
|
25
|
25
|
35
|
36
|
25
|
|
2025/06
|
22
|
21
|
19
|
26
|
33
|
36
|
34
|
30
|
34
|
40
|
33
|
39
|
46
|
44
|
19
|
27
|
23
|
19
|
16
|
17
|
15
|
17
|
24
|
17
|
18
|
24
|
21
|
23
|
21
|
17
|
|
|
2025/05
|
42
|
37
|
31
|
29
|
28
|
28
|
28
|
26
|
33
|
35
|
34
|
36
|
33
|
29
|
32
|
32
|
31
|
31
|
31
|
30
|
33
|
33
|
44
|
30
|
39
|
32
|
21
|
17
|
19
|
20
|
15
|
|
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