Air Quality
Excellent
No health implications.
15
PM2.5
24
PM10
70
O3
0.5
CO
8
SO2
7
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
25 Oct
63
Good
Sun
26 Oct
65
Good
Mon
27 Oct
63
Good
Tue
28 Oct
64
Good
Wed
29 Oct
57
Good
Thu
30 Oct
52
Good
Fri
31 Oct
37
Excellent
Air quality in the last 12 months (New Territories)
|
2025/08
|
23
|
26
|
35
|
30
|
17
|
17
|
20
|
27
|
21
|
10
|
13
|
16
|
20
|
17
|
14
|
18
|
17
|
12
|
15
|
16
|
14
|
14
|
19
|
20
|
14
|
19
|
13
|
24
|
18
|
18
|
10
|
|
2025/07
|
12
|
13
|
18
|
19
|
22
|
17
|
33
|
14
|
20
|
17
|
17
|
21
|
30
|
24
|
22
|
24
|
26
|
26
|
29
|
14
|
17
|
20
|
15
|
26
|
33
|
38
|
27
|
29
|
24
|
32
|
23
|
|
2025/06
|
27
|
24
|
20
|
14
|
20
|
18
|
15
|
11
|
12
|
11
|
14
|
13
|
13
|
25
|
30
|
24
|
18
|
13
|
12
|
11
|
13
|
14
|
11
|
11
|
10
|
12
|
13
|
11
|
12
|
11
|
|
|
2025/05
|
35
|
37
|
44
|
23
|
25
|
20
|
17
|
46
|
26
|
31
|
28
|
24
|
32
|
25
|
17
|
13
|
12
|
13
|
14
|
12
|
18
|
16
|
19
|
21
|
37
|
27
|
32
|
29
|
20
|
12
|
23
|
|
2025/04
|
22
|
19
|
28
|
41
|
31
|
42
|
44
|
50
|
38
|
25
|
22
|
25
|
152
|
154
|
105
|
75
|
58
|
46
|
25
|
24
|
22
|
23
|
22
|
19
|
21
|
15
|
28
|
33
|
25
|
40
|
|
|
2025/03
|
31
|
31
|
17
|
23
|
20
|
11
|
18
|
30
|
28
|
36
|
35
|
23
|
29
|
26
|
15
|
11
|
41
|
37
|
38
|
42
|
44
|
40
|
40
|
41
|
38
|
29
|
26
|
30
|
12
|
9
|
10
|
|
2025/02
|
20
|
17
|
13
|
14
|
36
|
33
|
25
|
40
|
43
|
43
|
29
|
20
|
39
|
40
|
26
|
48
|
39
|
61
|
37
|
35
|
39
|
32
|
18
|
21
|
49
|
48
|
28
|
26
|
|||
|
2025/01
|
52
|
60
|
50
|
46
|
52
|
56
|
46
|
59
|
57
|
46
|
45
|
29
|
36
|
39
|
51
|
63
|
52
|
53
|
47
|
47
|
35
|
49
|
41
|
20
|
24
|
21
|
18
|
35
|
55
|
37
|
29
|
|
2024/12
|
37
|
40
|
37
|
30
|
50
|
59
|
54
|
33
|
27
|
29
|
44
|
34
|
37
|
55
|
47
|
43
|
48
|
47
|
52
|
58
|
47
|
53
|
60
|
58
|
55
|
41
|
62
|
59
|
63
|
56
|
60
|
|
2024/11
|
33
|
29
|
40
|
47
|
43
|
53
|
41
|
39
|
41
|
38
|
39
|
40
|
29
|
13
|
12
|
22
|
18
|
30
|
15
|
8
|
14
|
25
|
29
|
36
|
36
|
18
|
31
|
33
|
32
|
36
|
|
|
2024/10
|
28
|
28
|
39
|
35
|
40
|
38
|
39
|
42
|
39
|
32
|
28
|
39
|
26
|
26
|
25
|
24
|
26
|
27
|
37
|
20
|
38
|
25
|
29
|
41
|
45
|
45
|
45
|
21
|
28
|
39
|
41
|
|
2024/09
|
13
|
18
|
34
|
28
|
22
|
13
|
21
|
14
|
11
|
21
|
27
|
23
|
21
|
21
|
32
|
15
|
21
|
21
|
31
|
22
|
15
|
15
|
12
|
10
|
22
|
29
|
28
|
34
|
24
|
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