Air Quality
Excellent
No health implications.
11
PM2.5
15
PM10
48
O3
0.5
CO
7
SO2
3
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 Apr
47
Excellent
Tue
22 Apr
45
Excellent
Wed
23 Apr
48
Excellent
Thu
24 Apr
52
Good
Fri
25 Apr
53
Good
Sat
26 Apr
53
Good
Sun
27 Apr
15
Excellent
Air quality in the last 12 months (New Territories)
|
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
|
|
|
2024/08
|
23
|
26
|
20
|
22
|
31
|
26
|
32
|
19
|
16
|
17
|
20
|
17
|
19
|
15
|
15
|
14
|
16
|
17
|
17
|
14
|
13
|
26
|
29
|
22
|
15
|
18
|
20
|
33
|
35
|
25
|
16
|
|
2024/07
|
22
|
22
|
12
|
12
|
12
|
11
|
11
|
17
|
11
|
10
|
11
|
10
|
12
|
13
|
13
|
12
|
13
|
13
|
14
|
16
|
16
|
12
|
13
|
19
|
28
|
25
|
17
|
10
|
11
|
9
|
13
|
|
2024/06
|
15
|
24
|
21
|
24
|
21
|
21
|
12
|
11
|
12
|
13
|
19
|
23
|
23
|
24
|
17
|
21
|
18
|
19
|
17
|
13
|
18
|
23
|
10
|
12
|
14
|
14
|
12
|
13
|
11
|
18
|
|
|
2024/05
|
20
|
25
|
29
|
20
|
14
|
20
|
36
|
32
|
33
|
29
|
30
|
35
|
32
|
23
|
29
|
38
|
35
|
28
|
30
|
15
|
14
|
21
|
12
|
11
|
15
|
18
|
20
|
18
|
28
|
17
|
17
|
|
2024/04
|
51
|
49
|
23
|
20
|
42
|
26
|
26
|
34
|
18
|
30
|
38
|
36
|
34
|
22
|
30
|
29
|
24
|
21
|
24
|
23
|
15
|
24
|
20
|
34
|
17
|
21
|
30
|
16
|
20
|
25
|
|
|
2024/03
|
19
|
23
|
32
|
36
|
36
|
45
|
35
|
33
|
50
|
28
|
25
|
16
|
59
|
59
|
60
|
60
|
49
|
35
|
21
|
51
|
50
|
53
|
43
|
26
|
27
|
50
|
27
|
37
|
48
|
36
|
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