Air Quality
Excellent
No health implications.
31
PM2.5
44
PM10
125
O3
0.8
CO
6
SO2
14
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
15 Oct
82
Good
Fri
16 Oct
77
Good
Sat
17 Oct
57
Good
Sun
18 Oct
61
Good
Mon
19 Oct
62
Good
Tue
20 Oct
64
Good
Wed
21 Oct
31
Excellent
Air quality in the last 12 months (Hong Kong)
|
2026/08
|
11
|
13
|
11
|
15
|
19
|
24
|
28
|
38
|
35
|
41
|
49
|
35
|
22
|
19
|
17
|
27
|
29
|
26
|
19
|
18
|
14
|
16
|
20
|
22
|
21
|
21
|
19
|
22
|
25
|
30
|
18
|
|
2026/07
|
14
|
18
|
18
|
17
|
19
|
19
|
15
|
16
|
16
|
16
|
30
|
25
|
18
|
13
|
15
|
14
|
15
|
22
|
28
|
28
|
30
|
32
|
34
|
33
|
39
|
18
|
16
|
14
|
15
|
17
|
11
|
|
2026/06
|
39
|
29
|
24
|
21
|
24
|
21
|
20
|
19
|
18
|
25
|
26
|
33
|
20
|
27
|
18
|
15
|
14
|
14
|
18
|
18
|
16
|
17
|
21
|
24
|
26
|
16
|
21
|
17
|
18
|
16
|
|
|
2026/05
|
27
|
34
|
24
|
26
|
29
|
26
|
26
|
26
|
31
|
33
|
35
|
28
|
17
|
17
|
19
|
27
|
28
|
34
|
22
|
19
|
18
|
19
|
22
|
22
|
20
|
21
|
20
|
22
|
29
|
37
|
40
|
|
2026/04
|
36
|
34
|
41
|
30
|
24
|
29
|
32
|
41
|
33
|
24
|
28
|
21
|
19
|
15
|
17
|
18
|
23
|
69
|
58
|
43
|
21
|
24
|
26
|
14
|
24
|
33
|
34
|
27
|
22
|
28
|
|
|
2026/03
|
23
|
24
|
14
|
9
|
17
|
25
|
39
|
47
|
40
|
26
|
29
|
41
|
44
|
38
|
38
|
35
|
29
|
25
|
21
|
33
|
36
|
33
|
31
|
26
|
28
|
27
|
38
|
29
|
33
|
24
|
29
|
|
2026/02
|
23
|
33
|
38
|
44
|
30
|
19
|
33
|
26
|
37
|
31
|
27
|
41
|
38
|
25
|
24
|
22
|
31
|
33
|
40
|
44
|
37
|
33
|
43
|
60
|
40
|
21
|
29
|
14
|
|||
|
2026/01
|
39
|
23
|
28
|
39
|
45
|
37
|
42
|
30
|
36
|
44
|
36
|
60
|
58
|
28
|
44
|
36
|
32
|
33
|
38
|
31
|
44
|
42
|
43
|
58
|
22
|
17
|
52
|
42
|
29
|
32
|
31
|
|
2025/12
|
37
|
28
|
44
|
65
|
49
|
41
|
47
|
45
|
43
|
45
|
44
|
42
|
42
|
37
|
39
|
50
|
46
|
41
|
38
|
20
|
38
|
45
|
29
|
32
|
23
|
31
|
43
|
36
|
31
|
53
|
30
|
|
2025/11
|
30
|
38
|
40
|
28
|
17
|
23
|
25
|
28
|
30
|
20
|
21
|
25
|
16
|
24
|
40
|
38
|
36
|
43
|
24
|
31
|
34
|
39
|
58
|
52
|
45
|
57
|
49
|
55
|
56
|
51
|
|
|
2025/10
|
13
|
11
|
9
|
20
|
23
|
15
|
16
|
18
|
25
|
21
|
19
|
13
|
12
|
12
|
13
|
18
|
27
|
27
|
25
|
22
|
13
|
11
|
21
|
32
|
34
|
40
|
52
|
48
|
31
|
34
|
35
|
|
2025/09
|
9
|
10
|
12
|
11
|
10
|
15
|
14
|
18
|
19
|
14
|
10
|
11
|
9
|
9
|
10
|
16
|
17
|
15
|
15
|
14
|
9
|
21
|
19
|
20
|
21
|
21
|
18
|
22
|
14
|
16
|
|
|
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