China   2025-04-18   Friday   22.31N, 114.18E

Hong Kong

China
2025-04-18

Air Quality

Excellent

No health implications.

21

PM2.5

40

PM10

33

O3

0.6

CO

7

SO2

19

NO2

No health implications.

Advise

Everyone can continue their outdoor activities normally.

Air Quality

Today

18 Apr

48 Excellent

Sat

19 Apr

47 Excellent

Sun

20 Apr

46 Excellent

Mon

21 Apr

42 Excellent

Tue

22 Apr

46 Excellent

Wed

23 Apr

44 Excellent

Thu

24 Apr

19 Excellent

Monthly Average AQI (Hong Kong)

2020/03 - 2025/02

Air quality in the last 12 months (Hong Kong)

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
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
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