Air Pollution in Hong Kong: Real-time Air Quality Index and smog alert.

Locations: « Central and Western District Hong Kong
Air pollution in Hong Kong from January 2018 to May 2020
pollution pm25 hikersbay.com
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 »

Causeway Bay

2018-01   2020-05
pollution pm25 hikersbay.com
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