Air Quality
Excellent
No health implications.
7
PM2.5
14
PM10
88
O3
0.5
CO
5
SO2
5
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
27 Feb
57
Good
Fri
28 Feb
58
Good
Sat
1 Mar
53
Good
Sun
2 Mar
50
Excellent
Mon
3 Mar
51
Good
Tue
4 Mar
18
Excellent
Wed
5 Mar
15
Excellent
Air quality in the last 12 months (Hong Kong)
|
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
|
|
2024/11
|
33
|
29
|
39
|
47
|
44
|
53
|
41
|
39
|
41
|
37
|
39
|
39
|
28
|
13
|
11
|
22
|
17
|
30
|
15
|
8
|
14
|
26
|
29
|
36
|
37
|
18
|
31
|
33
|
32
|
35
|
|
|
2024/10
|
29
|
29
|
40
|
36
|
41
|
39
|
39
|
42
|
39
|
32
|
27
|
38
|
25
|
25
|
24
|
23
|
25
|
27
|
37
|
19
|
38
|
26
|
29
|
40
|
45
|
45
|
45
|
22
|
28
|
39
|
41
|
|
2024/09
|
13
|
17
|
34
|
27
|
22
|
13
|
22
|
15
|
13
|
21
|
27
|
20
|
20
|
20
|
31
|
15
|
20
|
21
|
30
|
22
|
16
|
15
|
12
|
11
|
23
|
27
|
27
|
33
|
23
|
35
|
|
|
2024/08
|
24
|
27
|
20
|
21
|
31
|
25
|
30
|
18
|
15
|
17
|
20
|
16
|
18
|
13
|
15
|
13
|
15
|
17
|
16
|
14
|
13
|
24
|
27
|
22
|
14
|
16
|
19
|
32
|
35
|
24
|
15
|
|
2024/07
|
22
|
23
|
12
|
12
|
12
|
11
|
11
|
16
|
10
|
10
|
10
|
9
|
11
|
12
|
12
|
12
|
12
|
13
|
14
|
15
|
15
|
12
|
12
|
18
|
27
|
24
|
18
|
10
|
11
|
8
|
13
|
|
2024/06
|
16
|
23
|
22
|
25
|
21
|
23
|
12
|
11
|
12
|
14
|
19
|
23
|
22
|
24
|
18
|
22
|
18
|
19
|
17
|
13
|
18
|
24
|
10
|
12
|
15
|
14
|
13
|
13
|
11
|
18
|
|
|
2024/05
|
21
|
26
|
29
|
21
|
15
|
19
|
36
|
32
|
34
|
29
|
29
|
35
|
32
|
23
|
28
|
37
|
35
|
27
|
29
|
16
|
15
|
22
|
11
|
12
|
16
|
17
|
20
|
18
|
28
|
17
|
16
|
|
2024/04
|
51
|
49
|
23
|
20
|
42
|
27
|
25
|
35
|
18
|
30
|
37
|
35
|
33
|
21
|
29
|
28
|
24
|
19
|
24
|
24
|
16
|
23
|
20
|
34
|
17
|
20
|
30
|
16
|
20
|
25
|
|
|
2024/03
|
18
|
22
|
33
|
36
|
36
|
45
|
36
|
34
|
50
|
30
|
25
|
16
|
58
|
59
|
60
|
60
|
49
|
34
|
21
|
50
|
49
|
53
|
42
|
25
|
25
|
52
|
26
|
36
|
47
|
35
|
27
|
|
2024/02
|
26
|
24
|
23
|
23
|
26
|
23
|
18
|
13
|
17
|
62
|
51
|
34
|
46
|
39
|
34
|
36
|
28
|
34
|
26
|
19
|
21
|
22
|
37
|
35
|
28
|
45
|
37
|
43
|
49
|
||
|
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