Air Quality
Excellent
No health implications.
8
PM2.5
21
PM10
21
O3
0.6
CO
4
SO2
6
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 Jul
40
Excellent
Mon
20 Jul
42
Excellent
Tue
21 Jul
45
Excellent
Wed
22 Jul
52
Good
Thu
23 Jul
53
Good
Fri
24 Jul
18
Excellent
Sat
25 Jul
24
Excellent
Air quality in the last 12 months (Hong Kong)
|
2026/06
|
39
|
29
|
24
|
21
|
24
|
21
|
20
|
19
|
18
|
25
|
26
|
33
|
20
|
27
|
18
|
15
|
14
|
14
|
18
|
18
|
16
|
17
|
21
|
24
|
26
|
16
|
21
|
17
|
18
|
16
|
|
|
2026/05
|
27
|
34
|
24
|
26
|
29
|
26
|
26
|
26
|
31
|
33
|
35
|
28
|
17
|
17
|
19
|
27
|
28
|
34
|
22
|
19
|
18
|
19
|
22
|
22
|
20
|
21
|
20
|
22
|
29
|
37
|
40
|
|
2026/04
|
36
|
34
|
41
|
30
|
24
|
29
|
32
|
41
|
33
|
24
|
28
|
21
|
19
|
15
|
17
|
18
|
23
|
69
|
58
|
43
|
21
|
24
|
26
|
14
|
24
|
33
|
34
|
27
|
22
|
28
|
|
|
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
|
|
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