Air Pollution in Islands 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 | 21 (Good) | 37 (Good) | 30 (Good) | 31 (Good) | 38 (Good) | 51 (Moderate) | 42 (Moderate) | 33 (Good) | 33 (Good) | 23 (Good) | 16 (Good) | 20 (Good) | 25 (Good) | 23 (Good) | 32 (Good) | 32 (Good) | 64 (Moderate) | 43 (Moderate) | 36 (Good) | 41 (Moderate) | 35 (Good) | 28 (Good) | 17 (Good) | 23 (Good) | 19 (Good) | 27 (Good) | 34 (Good) | 48 (Moderate) | 41 (Moderate) |
| o3 | 43 (Good) | 62 (Good) | 54 (Good) | 48 (Good) | 44 (Good) | 48 (Good) | 83 (Moderate) | 93 (Moderate) | 82 (Moderate) | 60 (Good) | 48 (Good) | 46 (Good) | 64 (Good) | 60 (Good) | 55 (Good) | 42 (Good) | 36 (Good) | 27 (Good) | 51 (Good) | 76 (Moderate) | 47 (Good) | 55 (Good) | 38 (Good) | 58 (Good) | 50 (Good) | 50 (Good) | 48 (Good) | 29 (Good) | 42 (Good) |
| so2 | 5 (Good) | 6.8 (Good) | 5.9 (Good) | 5.2 (Good) | 5.3 (Good) | 6.4 (Good) | 4.9 (Good) | 3.8 (Good) | 4.5 (Good) | 4.4 (Good) | 8.6 (Good) | 7.4 (Good) | 6.6 (Good) | 3.3 (Good) | 3.3 (Good) | 9.9 (Good) | 13 (Good) | 11 (Good) | 10 (Good) | 11 (Good) | 9.1 (Good) | 7.2 (Good) | 6.5 (Good) | 6.6 (Good) | 5.8 (Good) | 6.7 (Good) | 13 (Good) | 11 (Good) | 9.4 (Good) |
| co | 317 (Good) | 495 (Good) | 505 (Good) | 509 (Good) | 666 (Good) | 563 (Good) | 654 (Good) | 668 (Good) | 489 (Good) | 419 (Good) | 346 (Good) | 452 (Good) | 535 (Good) | 508 (Good) | 521 (Good) | 484 (Good) | 760 (Good) | 746 (Good) | 556 (Good) | 512 (Good) | 458 (Good) | 446 (Good) | 325 (Good) | 438 (Good) | 418 (Good) | 459 (Good) | 429 (Good) | 725 (Good) | 693 (Good) |
| pm10 | 16 (Good) | 30 (Moderate) | 22 (Moderate) | 24 (Moderate) | 29 (Moderate) | 43 (Moderate) | 41 (Moderate) | 33 (Moderate) | 28 (Moderate) | 23 (Moderate) | 21 (Moderate) | 14 (Good) | 20 (Moderate) | 24 (Moderate) | 29 (Moderate) | 27 (Moderate) | 61 (Unhealthy for Sensitive Groups) | 40 (Moderate) | 38 (Moderate) | 44 (Moderate) | 27 (Moderate) | 21 (Moderate) | 14 (Good) | 19 (Good) | 13 (Good) | 33 (Moderate) | 32 (Moderate) | 46 (Moderate) | 42 (Moderate) |
| pm25 | 8.9 (Good) | 18 (Moderate) | 13 (Moderate) | 15 (Moderate) | 19 (Moderate) | 27 (Moderate) | 25 (Moderate) | 22 (Moderate) | 21 (Moderate) | 15 (Moderate) | 11 (Good) | 7.8 (Good) | 12 (Good) | 16 (Moderate) | 19 (Moderate) | 15 (Moderate) | 39 (Unhealthy for Sensitive Groups) | 23 (Moderate) | 22 (Moderate) | 24 (Moderate) | 15 (Moderate) | 13 (Good) | 6 (Good) | 9.9 (Good) | 6 (Good) | 15 (Moderate) | 18 (Moderate) | 28 (Moderate) | 27 (Moderate) |
Tung Chung
| 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 | 21 | 37 | 30 | 31 | 38 | 51 | 42 | 33 | 33 | 23 | 16 | 20 | 25 | 23 | 32 | 32 | 64 | 43 | 36 | 41 | 35 | 28 | 17 | 23 | 19 | 27 | 34 | 48 | 41 |
| o3 | 43 | 62 | 54 | 48 | 44 | 48 | 83 | 93 | 82 | 60 | 48 | 46 | 64 | 60 | 55 | 42 | 36 | 27 | 51 | 76 | 47 | 55 | 38 | 58 | 50 | 50 | 48 | 29 | 42 |
| so2 | 5 | 6.8 | 5.9 | 5.2 | 5.3 | 6.4 | 4.9 | 3.8 | 4.5 | 4.4 | 8.6 | 7.4 | 6.6 | 3.3 | 3.3 | 9.9 | 13 | 11 | 10 | 11 | 9.1 | 7.2 | 6.5 | 6.6 | 5.8 | 6.7 | 13 | 11 | 9.4 |
| co | 317 | 495 | 505 | 509 | 666 | 563 | 654 | 668 | 489 | 419 | 346 | 452 | 535 | 508 | 521 | 484 | 760 | 746 | 556 | 512 | 458 | 446 | 325 | 438 | 418 | 459 | 429 | 725 | 693 |
| pm10 | 16 | 30 | 22 | 24 | 29 | 43 | 41 | 33 | 28 | 23 | 21 | 14 | 20 | 24 | 29 | 27 | 61 | 40 | 38 | 44 | 27 | 21 | 14 | 19 | 13 | 33 | 32 | 46 | 42 |
| pm25 | 8.9 | 18 | 13 | 15 | 19 | 27 | 25 | 22 | 21 | 15 | 11 | 7.8 | 12 | 16 | 19 | 15 | 39 | 23 | 22 | 24 | 15 | 13 | 6 | 9.9 | 6 | 15 | 18 | 28 | 27 |
* Pollution data source:
https://openaq.org
(Hong Kong)
The data is licensed under CC-By 4.0