Air Quality
Excellent
No health implications.
10
PM2.5
17
PM10
42
O3
0.3
CO
6
SO2
6
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
16 Apr
41
Excellent
Fri
17 Apr
41
Excellent
Sat
18 Apr
60
Good
Sun
19 Apr
41
Excellent
Mon
20 Apr
42
Excellent
Tue
21 Apr
41
Excellent
Wed
22 Apr
33
Excellent
Hong Kong Air quality rank
Air quality in the last 12 months (Hong Kong)
|
2026/03
|
23
|
24
|
14
|
9
|
17
|
25
|
39
|
47
|
40
|
26
|
29
|
41
|
44
|
38
|
38
|
35
|
29
|
25
|
21
|
33
|
36
|
33
|
31
|
26
|
28
|
27
|
38
|
29
|
33
|
24
|
29
|
|
2026/02
|
23
|
33
|
38
|
44
|
30
|
19
|
33
|
26
|
37
|
31
|
27
|
41
|
38
|
25
|
24
|
22
|
31
|
33
|
40
|
44
|
37
|
33
|
43
|
60
|
40
|
21
|
29
|
14
|
|||
|
2026/01
|
39
|
23
|
28
|
39
|
45
|
37
|
42
|
30
|
36
|
44
|
36
|
60
|
58
|
28
|
44
|
36
|
32
|
33
|
38
|
31
|
44
|
42
|
43
|
58
|
22
|
17
|
52
|
42
|
29
|
32
|
31
|
|
2025/12
|
37
|
28
|
44
|
65
|
49
|
41
|
47
|
45
|
43
|
45
|
44
|
42
|
42
|
37
|
39
|
50
|
46
|
41
|
38
|
20
|
38
|
45
|
29
|
32
|
23
|
31
|
43
|
36
|
31
|
53
|
30
|
|
2025/11
|
30
|
38
|
40
|
28
|
17
|
23
|
25
|
28
|
30
|
20
|
21
|
25
|
16
|
24
|
40
|
38
|
36
|
43
|
24
|
31
|
34
|
39
|
58
|
52
|
45
|
57
|
49
|
55
|
56
|
51
|
|
|
2025/10
|
13
|
11
|
9
|
20
|
23
|
15
|
16
|
18
|
25
|
21
|
19
|
13
|
12
|
12
|
13
|
18
|
27
|
27
|
25
|
22
|
13
|
11
|
21
|
32
|
34
|
40
|
52
|
48
|
31
|
34
|
35
|
|
2025/09
|
9
|
10
|
12
|
11
|
10
|
15
|
14
|
18
|
19
|
14
|
10
|
11
|
9
|
9
|
10
|
16
|
17
|
15
|
15
|
14
|
9
|
21
|
19
|
20
|
21
|
21
|
18
|
22
|
14
|
16
|
|
|
2025/08
|
23
|
26
|
36
|
32
|
18
|
17
|
20
|
26
|
20
|
11
|
13
|
15
|
19
|
16
|
14
|
18
|
16
|
12
|
16
|
17
|
14
|
12
|
19
|
20
|
13
|
18
|
13
|
23
|
17
|
17
|
9
|
|
2025/07
|
11
|
13
|
18
|
19
|
22
|
15
|
31
|
13
|
19
|
17
|
17
|
20
|
30
|
23
|
21
|
23
|
24
|
25
|
29
|
14
|
17
|
21
|
15
|
27
|
32
|
38
|
25
|
28
|
23
|
31
|
23
|
|
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
|
|
|
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