Air Pollution in Sai Kung District: 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 | 31 (Good) | 27 (Good) | 21 (Good) | 20 (Good) | 23 (Good) | 30 (Good) | 30 (Good) | 32 (Good) | 29 (Good) | 31 (Good) | 29 (Good) | 31 (Good) | 22 (Good) | 33 (Good) | 26 (Good) | 21 (Good) | 36 (Good) | 26 (Good) | 21 (Good) | 28 (Good) | 32 (Good) | 39 (Good) | 21 (Good) | 26 (Good) | 29 (Good) | 27 (Good) | 29 (Good) | 32 (Good) | 28 (Good) |
| o3 | 39 (Good) | 80 (Moderate) | 74 (Moderate) | 71 (Moderate) | 78 (Moderate) | 80 (Moderate) | 102 (Moderate) | 105 (Moderate) | 95 (Moderate) | 56 (Good) | 39 (Good) | 39 (Good) | 79 (Moderate) | 62 (Good) | 75 (Moderate) | 65 (Good) | 70 (Moderate) | 55 (Good) | 83 (Moderate) | 105 (Moderate) | 56 (Good) | 49 (Good) | 36 (Good) | 59 (Good) | 48 (Good) | 73 (Moderate) | 80 (Moderate) | 70 (Moderate) | 68 (Good) |
| so2 | 4.3 (Good) | 3.9 (Good) | 3.3 (Good) | 2.2 (Good) | 1.9 (Good) | 4.5 (Good) | 4.9 (Good) | 4.4 (Good) | 5.2 (Good) | 4.2 (Good) | 3.5 (Good) | 3.2 (Good) | 2.6 (Good) | 2.7 (Good) | 6.2 (Good) | 5.5 (Good) | 5.9 (Good) | 5.9 (Good) | 8.5 (Good) | 7.1 (Good) | 6.3 (Good) | 5.3 (Good) | 4.4 (Good) | 4.2 (Good) | 5.1 (Good) | 5.6 (Good) | 4.6 (Good) | 4.2 (Good) | 3.9 (Good) |
| co | 712 (Good) | 712 (Good) | 675 (Good) | 623 (Good) | 701 (Good) | 634 (Good) | 591 (Good) | 553 (Good) | 461 (Good) | 452 (Good) | 371 (Good) | 314 (Good) | 323 (Good) | 399 (Good) | 735 (Good) | 647 (Good) | 786 (Good) | 792 (Good) | 729 (Good) | 614 (Good) | 603 (Good) | 593 (Good) | 446 (Good) | 485 (Good) | 430 (Good) | 506 (Good) | 524 (Good) | 868 (Good) | 877 (Good) |
| pm10 | 18 (Good) | 27 (Moderate) | 30 (Moderate) | 26 (Moderate) | 28 (Moderate) | 36 (Moderate) | 42 (Moderate) | 38 (Moderate) | 30 (Moderate) | 22 (Moderate) | 22 (Moderate) | 16 (Good) | 24 (Moderate) | 25 (Moderate) | 27 (Moderate) | 28 (Moderate) | 40 (Moderate) | 31 (Moderate) | 29 (Moderate) | 35 (Moderate) | 27 (Moderate) | 22 (Moderate) | 18 (Good) | 20 (Good) | 22 (Moderate) | 39 (Moderate) | 34 (Moderate) | 30 (Moderate) | 34 (Moderate) |
| pm25 | 9.4 (Good) | 15 (Moderate) | 15 (Moderate) | 13 (Good) | 17 (Moderate) | 20 (Moderate) | 23 (Moderate) | 24 (Moderate) | 17 (Moderate) | 13 (Good) | 11 (Good) | 7.4 (Good) | 13 (Moderate) | 16 (Moderate) | 16 (Moderate) | 16 (Moderate) | 26 (Moderate) | 18 (Moderate) | 17 (Moderate) | 19 (Moderate) | 15 (Moderate) | 12 (Good) | 7.2 (Good) | 9.6 (Good) | 10 (Good) | 20 (Moderate) | 18 (Moderate) | 19 (Moderate) | 20 (Moderate) |
Tseung Kwan O
| 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 | 31 | 27 | 21 | 20 | 23 | 30 | 30 | 32 | 29 | 31 | 29 | 31 | 22 | 33 | 26 | 21 | 36 | 26 | 21 | 28 | 32 | 39 | 21 | 26 | 29 | 27 | 29 | 32 | 28 |
| o3 | 39 | 80 | 74 | 71 | 78 | 80 | 102 | 105 | 95 | 56 | 39 | 39 | 79 | 62 | 75 | 65 | 70 | 55 | 83 | 105 | 56 | 49 | 36 | 59 | 48 | 73 | 80 | 70 | 68 |
| so2 | 4.3 | 3.9 | 3.3 | 2.2 | 1.9 | 4.5 | 4.9 | 4.4 | 5.2 | 4.2 | 3.5 | 3.2 | 2.6 | 2.7 | 6.2 | 5.5 | 5.9 | 5.9 | 8.5 | 7.1 | 6.3 | 5.3 | 4.4 | 4.2 | 5.1 | 5.6 | 4.6 | 4.2 | 3.9 |
| pm10 | 18 | 27 | 30 | 26 | 28 | 36 | 42 | 38 | 30 | 22 | 22 | 16 | 24 | 25 | 27 | 28 | 40 | 31 | 29 | 35 | 27 | 22 | 18 | 20 | 22 | 39 | 34 | 30 | 34 |
| pm25 | 9.4 | 15 | 15 | 13 | 17 | 20 | 23 | 24 | 17 | 13 | 11 | 7.4 | 13 | 16 | 16 | 16 | 26 | 18 | 17 | 19 | 15 | 12 | 7.2 | 9.6 | 10 | 20 | 18 | 19 | 20 |
| co | 712 | 712 | 675 | 623 | 701 | 634 | 591 | 553 | 461 | 452 | 371 | 314 | 323 | 399 | 735 | 647 | 786 | 792 | 729 | 614 | 603 | 593 | 446 | 485 | 430 | 506 | 524 | 868 | 877 |
* Pollution data source:
https://openaq.org
(Hong Kong)
The data is licensed under CC-By 4.0