Air Quality
Excellent
No health implications.
29
PM2.5
50
PM10
50
O3
0.7
CO
8
SO2
35
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
26 Dec
62
Good
Fri
27 Dec
56
Good
Sat
28 Dec
59
Good
Sun
29 Dec
88
Good
Mon
30 Dec
73
Good
Tue
31 Dec
71
Good
Wed
1 Jan
22
Excellent
Air quality in the last 12 months (Hong Kong)
|
2024/11
|
33
|
29
|
39
|
47
|
44
|
53
|
41
|
39
|
41
|
37
|
39
|
39
|
28
|
13
|
11
|
22
|
17
|
30
|
15
|
8
|
14
|
26
|
29
|
36
|
37
|
18
|
31
|
33
|
32
|
35
|
|
|
2024/10
|
29
|
29
|
40
|
36
|
41
|
39
|
39
|
42
|
39
|
32
|
27
|
38
|
25
|
25
|
24
|
23
|
25
|
27
|
37
|
19
|
38
|
26
|
29
|
40
|
45
|
45
|
45
|
22
|
28
|
39
|
41
|
|
2024/09
|
13
|
17
|
34
|
27
|
22
|
13
|
22
|
15
|
13
|
21
|
27
|
20
|
20
|
20
|
31
|
15
|
20
|
21
|
30
|
22
|
16
|
15
|
12
|
11
|
23
|
27
|
27
|
33
|
23
|
35
|
|
|
2024/08
|
24
|
27
|
20
|
21
|
31
|
25
|
30
|
18
|
15
|
17
|
20
|
16
|
18
|
13
|
15
|
13
|
15
|
17
|
16
|
14
|
13
|
24
|
27
|
22
|
14
|
16
|
19
|
32
|
35
|
24
|
15
|
|
2024/07
|
22
|
23
|
12
|
12
|
12
|
11
|
11
|
16
|
10
|
10
|
10
|
9
|
11
|
12
|
12
|
12
|
12
|
13
|
14
|
15
|
15
|
12
|
12
|
18
|
27
|
24
|
18
|
10
|
11
|
8
|
13
|
|
2024/06
|
16
|
23
|
22
|
25
|
21
|
23
|
12
|
11
|
12
|
14
|
19
|
23
|
22
|
24
|
18
|
22
|
18
|
19
|
17
|
13
|
18
|
24
|
10
|
12
|
15
|
14
|
13
|
13
|
11
|
18
|
|
|
2024/05
|
21
|
26
|
29
|
21
|
15
|
19
|
36
|
32
|
34
|
29
|
29
|
35
|
32
|
23
|
28
|
37
|
35
|
27
|
29
|
16
|
15
|
22
|
11
|
12
|
16
|
17
|
20
|
18
|
28
|
17
|
16
|
|
2024/04
|
51
|
49
|
23
|
20
|
42
|
27
|
25
|
35
|
18
|
30
|
37
|
35
|
33
|
21
|
29
|
28
|
24
|
19
|
24
|
24
|
16
|
23
|
20
|
34
|
17
|
20
|
30
|
16
|
20
|
25
|
|
|
2024/03
|
18
|
22
|
33
|
36
|
36
|
45
|
36
|
34
|
50
|
30
|
25
|
16
|
58
|
59
|
60
|
60
|
49
|
34
|
21
|
50
|
49
|
53
|
42
|
25
|
25
|
52
|
26
|
36
|
47
|
35
|
27
|
|
2024/02
|
26
|
24
|
23
|
23
|
26
|
23
|
18
|
13
|
17
|
62
|
51
|
34
|
46
|
39
|
34
|
36
|
28
|
34
|
26
|
19
|
21
|
22
|
37
|
35
|
28
|
45
|
37
|
43
|
49
|
||
|
2024/01
|
58
|
53
|
46
|
38
|
39
|
58
|
48
|
52
|
48
|
36
|
41
|
53
|
44
|
30
|
34
|
41
|
35
|
26
|
23
|
36
|
35
|
35
|
27
|
37
|
42
|
50
|
54
|
35
|
45
|
52
|
31
|
|
2023/12
|
50
|
51
|
49
|
57
|
49
|
42
|
27
|
35
|
42
|
34
|
19
|
39
|
32
|
28
|
23
|
21
|
34
|
47
|
37
|
29
|
30
|
53
|
49
|
43
|
43
|
49
|
51
|
55
|
36
|
51
|
64
|
|
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