Air Quality
Excellent
No health implications.
6
PM2.5
15
PM10
23
O3
0.5
CO
6
SO2
10
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
11 Aug
56
Good
Tue
12 Aug
42
Excellent
Wed
13 Aug
65
Good
Thu
14 Aug
41
Excellent
Fri
15 Aug
49
Excellent
Sat
16 Aug
64
Good
Sun
17 Aug
15
Excellent
Air quality in the last 12 months (Hong Kong)
|
2025/06
|
27
|
23
|
21
|
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
|
13
|
11
|
|
|
2025/05
|
34
|
37
|
44
|
23
|
24
|
19
|
17
|
46
|
26
|
31
|
28
|
24
|
32
|
24
|
17
|
12
|
11
|
12
|
13
|
12
|
17
|
16
|
18
|
20
|
37
|
26
|
31
|
28
|
19
|
12
|
23
|
|
2025/04
|
23
|
19
|
28
|
40
|
30
|
43
|
43
|
50
|
38
|
25
|
21
|
24
|
150
|
154
|
106
|
73
|
58
|
46
|
26
|
23
|
22
|
23
|
21
|
18
|
23
|
15
|
27
|
33
|
25
|
40
|
|
|
2025/03
|
32
|
32
|
16
|
22
|
21
|
10
|
18
|
30
|
29
|
36
|
35
|
23
|
28
|
27
|
15
|
11
|
41
|
37
|
38
|
41
|
43
|
39
|
38
|
37
|
36
|
27
|
25
|
29
|
12
|
9
|
10
|
|
2025/02
|
21
|
17
|
13
|
14
|
36
|
33
|
25
|
40
|
45
|
42
|
29
|
21
|
39
|
39
|
26
|
49
|
40
|
62
|
37
|
35
|
38
|
31
|
20
|
21
|
48
|
50
|
28
|
27
|
|||
|
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
|
|
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