Air Quality in Hong Kong Today — Live AQI, PM2.5 & PM10, Smog, Weather and Forecast
- particulate matter (PM2.5) dust - 22 (Moderate)
- particulate matter (PM10) suspended dust - 24 (Moderate)
- ozone (O3) - 26 (Good)
- nitrogen dioxide (NO2) - 62 (Moderate)
- sulfur dioxide (SO2) - 31 (Good)
- carbon monoxide (CO) - 284 (Good)
What is the air quality in Hong Kong today? Is the air polluted in Hong Kong?. Is there smog?
What is the current level of PM2.5 in Hong Kong? (particulate matter (PM2.5) dust)
Today's PM2.5 level is:
22 (Moderate)
For comparison, the highest level of PM2.5 in Hong Kong in the last 7 days was: 30 (Sunday, August 23, 2026) and the lowest: 15 (Thursday, August 20, 2026).
The highest PM2.5 values were recorded: 43 (February 2018).
The lowest level of particulate matter PM2.5 pollution occurs in month: May (17).
What is the level of PM10 today in Hong Kong? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Hong Kong is:
24 (Moderate)
The highest PM10 values usually occur in month: 63 (January 2019).
The lowest value of particulate matter PM10 pollution in Hong Kong is usually recorded in: June (27).
How is the O3 level today in Hong Kong? (ozone (O3))
26 (Good)
How high is the level of NO2? (nitrogen dioxide (NO2))
62 (Moderate)
What is the level of SO2 pollution? (sulfur dioxide (SO2))
31 (Good)
How high is the CO level? (carbon monoxide (CO))
284 (Good)
Current data Thursday, August 27, 2026 at 9:00 AM
PM2,5 22 (Moderate)
PM10 24 (Moderate)
O3 26 (Good)
NO2 62 (Moderate)
SO2 31 (Good)
CO 284 (Good)
Data on air pollution from recent days in Hong Kong
index
2026-08-27
2026-08-26
2026-08-25
2026-08-24
2026-08-23
2026-08-22
2026-08-21
2026-08-20
pm25
22
Moderate
22
Moderate
20
Moderate
20
Moderate
30
Moderate
28
Moderate
21
Moderate
15
Moderate
pm10
25
Moderate
26
Moderate
24
Moderate
23
Moderate
34
Moderate
32
Moderate
25
Moderate
18
Good
o3
44
Good
38
Good
51
Good
50
Good
54
Good
61
Good
38
Good
50
Good
no2
54
Moderate
50
Moderate
43
Moderate
43
Moderate
54
Moderate
57
Moderate
48
Moderate
38
Good
so2
31
Good
34
Good
32
Good
29
Good
31
Good
33
Good
40
Good
34
Good
co
233
Good
216
Good
200
Good
205
Good
280
Good
256
Good
229
Good
210
Good
data source »
Air pollution in Hong Kong from January 2018 to May 2020
index
2020-05
2020-04
2020-03
2020-02
2020-01
2019-12
2019-11
2019-10
2019-09
2019-08
2019-07
2019-06
2019-05
2019-04
2019-03
2019-02
2019-01
2018-12
2018-11
2018-10
2018-09
2018-08
2018-07
2018-06
2018-05
2018-04
2018-03
2018-02
2018-01
no2
64 (Moderate)
72 (Moderate)
66 (Moderate)
66 (Moderate)
75 (Moderate)
91 (Moderate)
88 (Moderate)
95 (Moderate)
100 (Unhealthy for Sensitive Groups)
77 (Moderate)
66 (Moderate)
68 (Moderate)
71 (Moderate)
76 (Moderate)
77 (Moderate)
68 (Moderate)
92 (Moderate)
74 (Moderate)
82 (Moderate)
101 (Unhealthy for Sensitive Groups)
90 (Moderate)
91 (Moderate)
61 (Moderate)
80 (Moderate)
75 (Moderate)
91 (Moderate)
96 (Moderate)
105 (Unhealthy for Sensitive Groups)
96 (Moderate)
o3
15 (Good)
43 (Good)
35 (Good)
34 (Good)
32 (Good)
30 (Good)
49 (Good)
48 (Good)
35 (Good)
20 (Good)
17 (Good)
17 (Good)
33 (Good)
26 (Good)
31 (Good)
23 (Good)
21 (Good)
17 (Good)
26 (Good)
39 (Good)
15 (Good)
14 (Good)
11 (Good)
20 (Good)
18 (Good)
24 (Good)
29 (Good)
15 (Good)
20 (Good)
so2
8.6 (Good)
5.3 (Good)
4.8 (Good)
4.3 (Good)
5.7 (Good)
7.6 (Good)
5.1 (Good)
4.6 (Good)
5.1 (Good)
4 (Good)
6.1 (Good)
5.7 (Good)
4.1 (Good)
4.5 (Good)
4 (Good)
3.8 (Good)
9 (Good)
8.7 (Good)
8.3 (Good)
8.8 (Good)
10 (Good)
6.8 (Good)
4.7 (Good)
5 (Good)
7.7 (Good)
8.1 (Good)
8.8 (Good)
11 (Good)
8.4 (Good)
co
540 (Good)
436 (Good)
414 (Good)
661 (Good)
867 (Good)
790 (Good)
714 (Good)
853 (Good)
731 (Good)
735 (Good)
739 (Good)
735 (Good)
681 (Good)
629 (Good)
645 (Good)
726 (Good)
815 (Good)
797 (Good)
698 (Good)
658 (Good)
675 (Good)
890 (Good)
811 (Good)
812 (Good)
732 (Good)
624 (Good)
839 (Good)
886 (Good)
855 (Good)
pm10
29 (Moderate)
40 (Moderate)
40 (Moderate)
37 (Moderate)
46 (Moderate)
55 (Unhealthy for Sensitive Groups)
53 (Unhealthy for Sensitive Groups)
52 (Unhealthy for Sensitive Groups)
46 (Moderate)
31 (Moderate)
32 (Moderate)
27 (Moderate)
37 (Moderate)
39 (Moderate)
39 (Moderate)
47 (Moderate)
63 (Unhealthy for Sensitive Groups)
48 (Moderate)
46 (Moderate)
53 (Unhealthy for Sensitive Groups)
41 (Moderate)
38 (Moderate)
35 (Moderate)
34 (Moderate)
33 (Moderate)
55 (Unhealthy for Sensitive Groups)
54 (Unhealthy for Sensitive Groups)
62 (Unhealthy for Sensitive Groups)
50 (Unhealthy for Sensitive Groups)
pm25
17 (Moderate)
24 (Moderate)
25 (Moderate)
22 (Moderate)
29 (Moderate)
33 (Moderate)
30 (Moderate)
33 (Moderate)
29 (Moderate)
21 (Moderate)
20 (Moderate)
18 (Moderate)
24 (Moderate)
27 (Moderate)
25 (Moderate)
30 (Moderate)
42 (Unhealthy for Sensitive Groups)
30 (Moderate)
30 (Moderate)
33 (Moderate)
28 (Moderate)
27 (Moderate)
19 (Moderate)
22 (Moderate)
21 (Moderate)
34 (Moderate)
35 (Moderate)
43 (Unhealthy for Sensitive Groups)
35 (Moderate)
data source »
Hong Kong
Thursday, August 27, 2026 at 9:00 AM
PM2,5 22 (Moderate)
particulate matter (PM2.5) dust
PM10 24 (Moderate)
particulate matter (PM10) suspended dust
O3 26 (Good)
ozone (O3)
NO2 62 (Moderate)
nitrogen dioxide (NO2)
SO2 31 (Good)
sulfur dioxide (SO2)
CO 284 (Good)
carbon monoxide (CO)
Hong Kong
index
2026-08-20
2026-08-21
2026-08-22
2026-08-23
2026-08-24
2026-08-25
2026-08-26
2026-08-27
pm25
15
21
28
30
20
20
22
22
pm10
18
25
32
34
23
24
26
25
o3
50
38
61
54
50
51
38
44
no2
38
48
57
54
43
43
50
54
so2
34
40
33
31
29
32
34
31
co
210
229
256
280
205
200
216
233
Causeway Bay
2018-01 2020-05
index
2020-05
2020-04
2020-03
2020-02
2020-01
2019-12
2019-11
2019-10
2019-09
2019-08
2019-07
2019-06
2019-05
2019-04
2019-03
2019-02
2019-01
2018-12
2018-11
2018-10
2018-09
2018-08
2018-07
2018-06
2018-05
2018-04
2018-03
2018-02
2018-01
no2
64
72
66
66
75
91
88
95
100
77
66
68
71
76
77
68
92
74
82
101
90
91
61
80
75
91
96
105
96
o3
15
43
35
34
32
30
49
48
35
20
17
17
33
26
31
23
21
17
26
39
15
14
11
20
18
24
29
15
20
so2
8.6
5.3
4.8
4.3
5.7
7.6
5.1
4.6
5.1
4
6.1
5.7
4.1
4.5
4
3.8
9
8.7
8.3
8.8
10
6.8
4.7
5
7.7
8.1
8.8
11
8.4
pm10
29
40
40
37
46
55
53
52
46
31
32
27
37
39
39
47
63
48
46
53
41
38
35
34
33
55
54
62
50
pm25
17
24
25
22
29
33
30
33
29
21
20
18
24
27
25
30
42
30
30
33
28
27
19
22
21
34
35
43
35
co
540
436
414
661
867
790
714
853
731
735
739
735
681
629
645
726
815
797
698
658
675
890
811
812
732
624
839
886
855
* Pollution data source:
https://openaq.org
(Hong Kong)
The data is licensed under CC-By 4.0
🌦️ Weather · 16-day Forecast — Hong Kong
PM2,5 22 (Moderate)
PM10 24 (Moderate)
O3 26 (Good)
NO2 62 (Moderate)
SO2 31 (Good)
CO 284 (Good)
Data on air pollution from recent days in Hong Kong
| index | 2026-08-27 | 2026-08-26 | 2026-08-25 | 2026-08-24 | 2026-08-23 | 2026-08-22 | 2026-08-21 | 2026-08-20 |
|---|---|---|---|---|---|---|---|---|
| pm25 | 22 Moderate |
22 Moderate |
20 Moderate |
20 Moderate |
30 Moderate |
28 Moderate |
21 Moderate |
15 Moderate |
| pm10 | 25 Moderate |
26 Moderate |
24 Moderate |
23 Moderate |
34 Moderate |
32 Moderate |
25 Moderate |
18 Good |
| o3 | 44 Good |
38 Good |
51 Good |
50 Good |
54 Good |
61 Good |
38 Good |
50 Good |
| no2 | 54 Moderate |
50 Moderate |
43 Moderate |
43 Moderate |
54 Moderate |
57 Moderate |
48 Moderate |
38 Good |
| so2 | 31 Good |
34 Good |
32 Good |
29 Good |
31 Good |
33 Good |
40 Good |
34 Good |
| co | 233 Good |
216 Good |
200 Good |
205 Good |
280 Good |
256 Good |
229 Good |
210 Good |
| index | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| no2 | 64 (Moderate) | 72 (Moderate) | 66 (Moderate) | 66 (Moderate) | 75 (Moderate) | 91 (Moderate) | 88 (Moderate) | 95 (Moderate) | 100 (Unhealthy for Sensitive Groups) | 77 (Moderate) | 66 (Moderate) | 68 (Moderate) | 71 (Moderate) | 76 (Moderate) | 77 (Moderate) | 68 (Moderate) | 92 (Moderate) | 74 (Moderate) | 82 (Moderate) | 101 (Unhealthy for Sensitive Groups) | 90 (Moderate) | 91 (Moderate) | 61 (Moderate) | 80 (Moderate) | 75 (Moderate) | 91 (Moderate) | 96 (Moderate) | 105 (Unhealthy for Sensitive Groups) | 96 (Moderate) |
| o3 | 15 (Good) | 43 (Good) | 35 (Good) | 34 (Good) | 32 (Good) | 30 (Good) | 49 (Good) | 48 (Good) | 35 (Good) | 20 (Good) | 17 (Good) | 17 (Good) | 33 (Good) | 26 (Good) | 31 (Good) | 23 (Good) | 21 (Good) | 17 (Good) | 26 (Good) | 39 (Good) | 15 (Good) | 14 (Good) | 11 (Good) | 20 (Good) | 18 (Good) | 24 (Good) | 29 (Good) | 15 (Good) | 20 (Good) |
| so2 | 8.6 (Good) | 5.3 (Good) | 4.8 (Good) | 4.3 (Good) | 5.7 (Good) | 7.6 (Good) | 5.1 (Good) | 4.6 (Good) | 5.1 (Good) | 4 (Good) | 6.1 (Good) | 5.7 (Good) | 4.1 (Good) | 4.5 (Good) | 4 (Good) | 3.8 (Good) | 9 (Good) | 8.7 (Good) | 8.3 (Good) | 8.8 (Good) | 10 (Good) | 6.8 (Good) | 4.7 (Good) | 5 (Good) | 7.7 (Good) | 8.1 (Good) | 8.8 (Good) | 11 (Good) | 8.4 (Good) |
| co | 540 (Good) | 436 (Good) | 414 (Good) | 661 (Good) | 867 (Good) | 790 (Good) | 714 (Good) | 853 (Good) | 731 (Good) | 735 (Good) | 739 (Good) | 735 (Good) | 681 (Good) | 629 (Good) | 645 (Good) | 726 (Good) | 815 (Good) | 797 (Good) | 698 (Good) | 658 (Good) | 675 (Good) | 890 (Good) | 811 (Good) | 812 (Good) | 732 (Good) | 624 (Good) | 839 (Good) | 886 (Good) | 855 (Good) |
| pm10 | 29 (Moderate) | 40 (Moderate) | 40 (Moderate) | 37 (Moderate) | 46 (Moderate) | 55 (Unhealthy for Sensitive Groups) | 53 (Unhealthy for Sensitive Groups) | 52 (Unhealthy for Sensitive Groups) | 46 (Moderate) | 31 (Moderate) | 32 (Moderate) | 27 (Moderate) | 37 (Moderate) | 39 (Moderate) | 39 (Moderate) | 47 (Moderate) | 63 (Unhealthy for Sensitive Groups) | 48 (Moderate) | 46 (Moderate) | 53 (Unhealthy for Sensitive Groups) | 41 (Moderate) | 38 (Moderate) | 35 (Moderate) | 34 (Moderate) | 33 (Moderate) | 55 (Unhealthy for Sensitive Groups) | 54 (Unhealthy for Sensitive Groups) | 62 (Unhealthy for Sensitive Groups) | 50 (Unhealthy for Sensitive Groups) |
| pm25 | 17 (Moderate) | 24 (Moderate) | 25 (Moderate) | 22 (Moderate) | 29 (Moderate) | 33 (Moderate) | 30 (Moderate) | 33 (Moderate) | 29 (Moderate) | 21 (Moderate) | 20 (Moderate) | 18 (Moderate) | 24 (Moderate) | 27 (Moderate) | 25 (Moderate) | 30 (Moderate) | 42 (Unhealthy for Sensitive Groups) | 30 (Moderate) | 30 (Moderate) | 33 (Moderate) | 28 (Moderate) | 27 (Moderate) | 19 (Moderate) | 22 (Moderate) | 21 (Moderate) | 34 (Moderate) | 35 (Moderate) | 43 (Unhealthy for Sensitive Groups) | 35 (Moderate) |
PM2,5 22 (Moderate)
particulate matter (PM2.5) dustPM10 24 (Moderate)
particulate matter (PM10) suspended dustO3 26 (Good)
ozone (O3)NO2 62 (Moderate)
nitrogen dioxide (NO2)SO2 31 (Good)
sulfur dioxide (SO2)CO 284 (Good)
carbon monoxide (CO)Hong Kong
| index | 2026-08-20 | 2026-08-21 | 2026-08-22 | 2026-08-23 | 2026-08-24 | 2026-08-25 | 2026-08-26 | 2026-08-27 |
|---|---|---|---|---|---|---|---|---|
| pm25 | 15 | 21 | 28 | 30 | 20 | 20 | 22 | 22 |
| pm10 | 18 | 25 | 32 | 34 | 23 | 24 | 26 | 25 |
| o3 | 50 | 38 | 61 | 54 | 50 | 51 | 38 | 44 |
| no2 | 38 | 48 | 57 | 54 | 43 | 43 | 50 | 54 |
| so2 | 34 | 40 | 33 | 31 | 29 | 32 | 34 | 31 |
| co | 210 | 229 | 256 | 280 | 205 | 200 | 216 | 233 |
Causeway Bay
| index | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| no2 | 64 | 72 | 66 | 66 | 75 | 91 | 88 | 95 | 100 | 77 | 66 | 68 | 71 | 76 | 77 | 68 | 92 | 74 | 82 | 101 | 90 | 91 | 61 | 80 | 75 | 91 | 96 | 105 | 96 |
| o3 | 15 | 43 | 35 | 34 | 32 | 30 | 49 | 48 | 35 | 20 | 17 | 17 | 33 | 26 | 31 | 23 | 21 | 17 | 26 | 39 | 15 | 14 | 11 | 20 | 18 | 24 | 29 | 15 | 20 |
| so2 | 8.6 | 5.3 | 4.8 | 4.3 | 5.7 | 7.6 | 5.1 | 4.6 | 5.1 | 4 | 6.1 | 5.7 | 4.1 | 4.5 | 4 | 3.8 | 9 | 8.7 | 8.3 | 8.8 | 10 | 6.8 | 4.7 | 5 | 7.7 | 8.1 | 8.8 | 11 | 8.4 |
| pm10 | 29 | 40 | 40 | 37 | 46 | 55 | 53 | 52 | 46 | 31 | 32 | 27 | 37 | 39 | 39 | 47 | 63 | 48 | 46 | 53 | 41 | 38 | 35 | 34 | 33 | 55 | 54 | 62 | 50 |
| pm25 | 17 | 24 | 25 | 22 | 29 | 33 | 30 | 33 | 29 | 21 | 20 | 18 | 24 | 27 | 25 | 30 | 42 | 30 | 30 | 33 | 28 | 27 | 19 | 22 | 21 | 34 | 35 | 43 | 35 |
| co | 540 | 436 | 414 | 661 | 867 | 790 | 714 | 853 | 731 | 735 | 739 | 735 | 681 | 629 | 645 | 726 | 815 | 797 | 698 | 658 | 675 | 890 | 811 | 812 | 732 | 624 | 839 | 886 | 855 |
16-day weather forecast for Hong Kong: today around 32°C (rain), lows near 28°C. Daily temperature and conditions, updated every day. Strong wind (about 24 km/h) is actively clearing smog and dust away.
☀️ UV Index · 16-day Forecast — Hong Kong
The UV index in Hong Kong today is 8.8 (very high) — unprotected fair skin can burn in about 25 minutes.