Air Pollution in Yau Tsim Mong: Real-time Air Quality Index and smog alert.
| 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 | 82 (Moderate) | 102 (Unhealthy for Sensitive Groups) | 93 (Moderate) | 68 (Moderate) | 77 (Moderate) | 81 (Moderate) | 71 (Moderate) | 84 (Moderate) | 90 (Moderate) | 77 (Moderate) | 69 (Moderate) | 69 (Moderate) | 77 (Moderate) | 80 (Moderate) | 77 (Moderate) | 70 (Moderate) | 94 (Moderate) | 71 (Moderate) | 81 (Moderate) | 91 (Moderate) | 80 (Moderate) | 85 (Moderate) | 56 (Moderate) | 74 (Moderate) | 72 (Moderate) | 79 (Moderate) | 86 (Moderate) | 89 (Moderate) | 81 (Moderate) |
| o3 | 19 (Good) | 34 (Good) | 24 (Good) | 30 (Good) | 30 (Good) | 33 (Good) | 63 (Good) | 55 (Good) | 48 (Good) | 21 (Good) | 14 (Good) | 15 (Good) | 31 (Good) | 23 (Good) | 29 (Good) | 22 (Good) | 24 (Good) | 19 (Good) | 34 (Good) | 54 (Good) | 26 (Good) | 20 (Good) | 12 (Good) | 23 (Good) | 18 (Good) | 30 (Good) | 35 (Good) | 25 (Good) | 29 (Good) |
| so2 | 6.3 (Good) | 6.7 (Good) | 6.5 (Good) | 3.5 (Good) | 3.4 (Good) | 5.6 (Good) | 3.9 (Good) | 3.9 (Good) | 3.5 (Good) | 3.2 (Good) | 3.4 (Good) | 3.6 (Good) | 2.6 (Good) | 3.1 (Good) | 3.1 (Good) | 3.1 (Good) | 5.1 (Good) | 5.9 (Good) | 3.5 (Good) | 4.4 (Good) | 6.9 (Good) | 6.1 (Good) | 5.2 (Good) | 5 (Good) | 7.3 (Good) | 6.3 (Good) | 6.1 (Good) | 6 (Good) | 5.5 (Good) |
| co | 753 (Good) | 858 (Good) | 872 (Good) | 735 (Good) | 797 (Good) | 698 (Good) | 722 (Good) | 722 (Good) | 778 (Good) | 720 (Good) | 680 (Good) | 821 (Good) | 861 (Good) | 702 (Good) | 827 (Good) | 827 (Good) | 864 (Good) | 781 (Good) | 824 (Good) | 735 (Good) | 770 (Good) | 822 (Good) | 689 (Good) | 774 (Good) | 624 (Good) | 783 (Good) | 746 (Good) | 841 (Good) | 804 (Good) |
| pm10 | 18 (Good) | 34 (Moderate) | 36 (Moderate) | 31 (Moderate) | 38 (Moderate) | 46 (Moderate) | 49 (Moderate) | 44 (Moderate) | 37 (Moderate) | 26 (Moderate) | 24 (Moderate) | 18 (Good) | 29 (Moderate) | 31 (Moderate) | 35 (Moderate) | 36 (Moderate) | 53 (Unhealthy for Sensitive Groups) | 40 (Moderate) | 35 (Moderate) | 41 (Moderate) | 30 (Moderate) | 34 (Moderate) | 22 (Moderate) | 18 (Good) | 23 (Moderate) | 44 (Moderate) | 43 (Moderate) | 51 (Unhealthy for Sensitive Groups) | 43 (Moderate) |
| pm25 | 12 (Good) | 22 (Moderate) | 23 (Moderate) | 20 (Moderate) | 26 (Moderate) | 30 (Moderate) | 29 (Moderate) | 29 (Moderate) | 25 (Moderate) | 19 (Moderate) | 16 (Moderate) | 12 (Good) | 20 (Moderate) | 23 (Moderate) | 24 (Moderate) | 25 (Moderate) | 37 (Unhealthy for Sensitive Groups) | 28 (Moderate) | 23 (Moderate) | 27 (Moderate) | 21 (Moderate) | 26 (Moderate) | 13 (Moderate) | 12 (Good) | 15 (Moderate) | 27 (Moderate) | 28 (Moderate) | 35 (Unhealthy for Sensitive Groups) | 31 (Moderate) |
Mong Kok
| 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 | 82 | 102 | 93 | 68 | 77 | 81 | 71 | 84 | 90 | 77 | 69 | 69 | 77 | 80 | 77 | 70 | 94 | 71 | 81 | 91 | 80 | 85 | 56 | 74 | 72 | 79 | 86 | 89 | 81 |
| o3 | 19 | 34 | 24 | 30 | 30 | 33 | 63 | 55 | 48 | 21 | 14 | 15 | 31 | 23 | 29 | 22 | 24 | 19 | 34 | 54 | 26 | 20 | 12 | 23 | 18 | 30 | 35 | 25 | 29 |
| so2 | 6.3 | 6.7 | 6.5 | 3.5 | 3.4 | 5.6 | 3.9 | 3.9 | 3.5 | 3.2 | 3.4 | 3.6 | 2.6 | 3.1 | 3.1 | 3.1 | 5.1 | 5.9 | 3.5 | 4.4 | 6.9 | 6.1 | 5.2 | 5 | 7.3 | 6.3 | 6.1 | 6 | 5.5 |
| pm10 | 18 | 34 | 36 | 31 | 38 | 46 | 49 | 44 | 37 | 26 | 24 | 18 | 29 | 31 | 35 | 36 | 53 | 40 | 35 | 41 | 30 | 34 | 22 | 18 | 23 | 44 | 43 | 51 | 43 |
| pm25 | 12 | 22 | 23 | 20 | 26 | 30 | 29 | 29 | 25 | 19 | 16 | 12 | 20 | 23 | 24 | 25 | 37 | 28 | 23 | 27 | 21 | 26 | 13 | 12 | 15 | 27 | 28 | 35 | 31 |
| co | 753 | 858 | 872 | 735 | 797 | 698 | 722 | 722 | 778 | 720 | 680 | 821 | 861 | 702 | 827 | 827 | 864 | 781 | 824 | 735 | 770 | 822 | 689 | 774 | 624 | 783 | 746 | 841 | 804 |
* Pollution data source:
https://openaq.org
(Hong Kong)
The data is licensed under CC-By 4.0