Air Quality
Excellent
No health implications.
4
PM2.5
12
PM10
37
O3
0.6
CO
7
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
14 Nov
66
Good
Sat
15 Nov
66
Good
Sun
16 Nov
68
Good
Mon
17 Nov
54
Good
Tue
18 Nov
47
Excellent
Wed
19 Nov
46
Excellent
Thu
20 Nov
45
Excellent
Air quality in the last 12 months (Kowloon)
|
2025/10
|
13
|
11
|
9
|
20
|
23
|
15
|
16
|
18
|
25
|
21
|
18
|
13
|
11
|
12
|
13
|
18
|
28
|
27
|
26
|
22
|
13
|
10
|
21
|
31
|
34
|
40
|
52
|
48
|
31
|
34
|
34
|
|
2025/09
|
9
|
10
|
12
|
11
|
10
|
15
|
14
|
18
|
19
|
13
|
10
|
11
|
9
|
9
|
10
|
17
|
17
|
15
|
15
|
14
|
9
|
21
|
19
|
20
|
21
|
20
|
18
|
22
|
14
|
16
|
|
|
2025/08
|
23
|
26
|
36
|
31
|
18
|
17
|
20
|
26
|
21
|
11
|
12
|
15
|
19
|
16
|
14
|
18
|
16
|
12
|
15
|
17
|
14
|
12
|
19
|
20
|
13
|
18
|
13
|
24
|
17
|
17
|
9
|
|
2025/07
|
12
|
13
|
18
|
19
|
22
|
15
|
31
|
13
|
19
|
17
|
17
|
21
|
30
|
23
|
21
|
23
|
24
|
24
|
29
|
14
|
17
|
21
|
15
|
27
|
32
|
38
|
25
|
28
|
23
|
31
|
23
|
|
2025/06
|
27
|
23
|
20
|
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
|
12
|
11
|
|
|
2025/05
|
34
|
37
|
44
|
23
|
25
|
19
|
17
|
46
|
26
|
30
|
28
|
24
|
32
|
24
|
17
|
12
|
11
|
12
|
13
|
12
|
17
|
16
|
18
|
20
|
37
|
26
|
31
|
28
|
19
|
12
|
23
|
|
2025/04
|
22
|
19
|
27
|
40
|
30
|
42
|
43
|
50
|
38
|
24
|
21
|
24
|
150
|
153
|
106
|
73
|
58
|
46
|
26
|
23
|
22
|
23
|
21
|
18
|
22
|
15
|
28
|
33
|
25
|
40
|
|
|
2025/03
|
32
|
32
|
16
|
22
|
21
|
10
|
18
|
30
|
28
|
36
|
35
|
22
|
28
|
26
|
15
|
11
|
40
|
37
|
37
|
41
|
43
|
39
|
37
|
37
|
36
|
27
|
25
|
28
|
12
|
9
|
10
|
|
2025/02
|
21
|
17
|
13
|
13
|
36
|
33
|
25
|
40
|
45
|
42
|
29
|
20
|
39
|
40
|
25
|
48
|
40
|
62
|
37
|
35
|
38
|
31
|
19
|
21
|
48
|
49
|
28
|
27
|
|||
|
2025/01
|
52
|
61
|
50
|
45
|
51
|
56
|
45
|
58
|
56
|
46
|
44
|
28
|
34
|
37
|
50
|
62
|
52
|
53
|
46
|
46
|
34
|
48
|
41
|
20
|
24
|
21
|
18
|
33
|
52
|
37
|
30
|
|
2024/12
|
35
|
40
|
36
|
28
|
49
|
58
|
55
|
35
|
28
|
28
|
43
|
35
|
37
|
54
|
47
|
43
|
47
|
47
|
52
|
58
|
47
|
52
|
61
|
58
|
56
|
42
|
62
|
59
|
63
|
56
|
61
|
|
2024/11
|
33
|
28
|
39
|
47
|
43
|
53
|
41
|
38
|
41
|
36
|
38
|
39
|
28
|
13
|
12
|
22
|
17
|
30
|
15
|
8
|
14
|
25
|
29
|
36
|
37
|
18
|
30
|
33
|
31
|
35
|
|
|
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