Air Quality
Excellent
No health implications.
19
PM2.5
41
PM10
23
O3
0.7
CO
7
SO2
16
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
22 Jan
44
Excellent
Fri
23 Jan
48
Excellent
Sat
24 Jan
53
Good
Sun
25 Jan
45
Excellent
Mon
26 Jan
47
Excellent
Tue
27 Jan
57
Good
Wed
28 Jan
25
Excellent
Air quality in the last 12 months (Hong Kong)
|
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
|
|
|
2025/08
|
23
|
26
|
36
|
32
|
18
|
17
|
20
|
26
|
20
|
11
|
13
|
15
|
19
|
16
|
14
|
18
|
16
|
12
|
16
|
17
|
14
|
12
|
19
|
20
|
13
|
18
|
13
|
23
|
17
|
17
|
9
|
|
2025/07
|
11
|
13
|
18
|
19
|
22
|
15
|
31
|
13
|
19
|
17
|
17
|
20
|
30
|
23
|
21
|
23
|
24
|
25
|
29
|
14
|
17
|
21
|
15
|
27
|
32
|
38
|
25
|
28
|
23
|
31
|
23
|
|
2025/06
|
27
|
23
|
21
|
14
|
19
|
17
|
14
|
10
|
11
|
10
|
13
|
13
|
12
|
26
|
30
|
24
|
18
|
13
|
11
|
11
|
12
|
14
|
11
|
10
|
9
|
12
|
13
|
11
|
13
|
11
|
|
|
2025/05
|
34
|
37
|
44
|
23
|
24
|
19
|
17
|
46
|
26
|
31
|
28
|
24
|
32
|
24
|
17
|
12
|
11
|
12
|
13
|
12
|
17
|
16
|
18
|
20
|
37
|
26
|
31
|
28
|
19
|
12
|
23
|
|
2025/04
|
23
|
19
|
28
|
40
|
30
|
43
|
43
|
50
|
38
|
25
|
21
|
24
|
150
|
154
|
106
|
73
|
58
|
46
|
26
|
23
|
22
|
23
|
21
|
18
|
23
|
15
|
27
|
33
|
25
|
40
|
|
|
2025/03
|
32
|
32
|
16
|
22
|
21
|
10
|
18
|
30
|
29
|
36
|
35
|
23
|
28
|
27
|
15
|
11
|
41
|
37
|
38
|
41
|
43
|
39
|
38
|
37
|
36
|
27
|
25
|
29
|
12
|
9
|
10
|
|
2025/02
|
21
|
17
|
13
|
14
|
36
|
33
|
25
|
40
|
45
|
42
|
29
|
21
|
39
|
39
|
26
|
49
|
40
|
62
|
37
|
35
|
38
|
31
|
20
|
21
|
48
|
50
|
28
|
27
|
|||
|
2025/01
|
52
|
61
|
50
|
45
|
52
|
57
|
45
|
58
|
57
|
46
|
44
|
28
|
34
|
37
|
51
|
62
|
52
|
53
|
47
|
47
|
35
|
49
|
42
|
20
|
24
|
21
|
18
|
33
|
52
|
37
|
30
|
|
2024/12
|
36
|
40
|
36
|
28
|
49
|
59
|
56
|
35
|
28
|
28
|
43
|
36
|
38
|
54
|
47
|
43
|
47
|
48
|
52
|
58
|
48
|
52
|
61
|
58
|
56
|
43
|
63
|
59
|
63
|
57
|
61
|
|
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