Air Quality
Excellent
No health implications.
4
PM2.5
11
PM10
19
O3
0.5
CO
5
SO2
19
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
31 Mar
41
Excellent
Tue
1 Apr
55
Good
Wed
2 Apr
81
Good
Thu
3 Apr
77
Good
Fri
4 Apr
63
Good
Sat
5 Apr
52
Good
Sun
6 Apr
30
Excellent
Air quality in the last 12 months (Kowloon)
|
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
|
|
|
2024/10
|
28
|
29
|
39
|
36
|
41
|
38
|
39
|
41
|
38
|
31
|
27
|
38
|
25
|
25
|
24
|
23
|
25
|
27
|
37
|
19
|
37
|
25
|
28
|
40
|
45
|
44
|
45
|
22
|
28
|
39
|
41
|
|
2024/09
|
13
|
17
|
34
|
27
|
22
|
13
|
22
|
15
|
12
|
22
|
27
|
20
|
20
|
20
|
31
|
15
|
20
|
21
|
30
|
22
|
15
|
15
|
12
|
11
|
23
|
27
|
26
|
33
|
23
|
35
|
|
|
2024/08
|
24
|
26
|
20
|
21
|
31
|
25
|
30
|
18
|
15
|
17
|
20
|
16
|
18
|
13
|
14
|
13
|
15
|
17
|
16
|
14
|
13
|
24
|
28
|
22
|
14
|
16
|
19
|
32
|
35
|
24
|
15
|
|
2024/07
|
22
|
23
|
12
|
11
|
12
|
11
|
11
|
16
|
11
|
10
|
11
|
9
|
11
|
12
|
12
|
12
|
12
|
13
|
15
|
16
|
15
|
12
|
12
|
19
|
27
|
24
|
18
|
10
|
11
|
8
|
13
|
|
2024/06
|
16
|
23
|
22
|
25
|
21
|
22
|
12
|
12
|
12
|
14
|
19
|
23
|
22
|
24
|
17
|
21
|
18
|
19
|
17
|
13
|
18
|
24
|
10
|
12
|
15
|
14
|
13
|
13
|
11
|
18
|
|
|
2024/05
|
22
|
25
|
29
|
21
|
14
|
19
|
35
|
32
|
34
|
29
|
29
|
34
|
31
|
23
|
28
|
37
|
35
|
27
|
29
|
15
|
15
|
22
|
11
|
11
|
16
|
17
|
20
|
18
|
28
|
17
|
16
|
|
2024/04
|
51
|
49
|
23
|
20
|
42
|
27
|
25
|
35
|
18
|
30
|
37
|
34
|
33
|
21
|
29
|
28
|
24
|
19
|
24
|
23
|
15
|
23
|
20
|
33
|
17
|
20
|
29
|
16
|
20
|
25
|
|
|
2024/03
|
18
|
21
|
32
|
36
|
35
|
45
|
36
|
34
|
50
|
30
|
25
|
16
|
58
|
59
|
60
|
60
|
49
|
34
|
21
|
50
|
49
|
53
|
42
|
25
|
25
|
51
|
27
|
36
|
47
|
35
|
27
|
|
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