Air Pollution in Chung Wai: 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 | 6.9 (Good) | 9 (Good) | 11 (Good) | 6.3 (Good) | 9.2 (Good) | 14 (Good) | 11 (Good) | 7.7 (Good) | 5.8 (Good) | 8.9 (Good) | 6.2 (Good) | 9.2 (Good) | 9 (Good) | 12 (Good) | 12 (Good) | 9.9 (Good) | 18 (Good) | 16 (Good) | 11 (Good) | 11 (Good) | 11 (Good) | 9.1 (Good) | 6.5 (Good) | 8.5 (Good) | 12 (Good) | 11 (Good) | 10 (Good) | 11 (Good) | 11 (Good) |
| o3 | 52 (Good) | 84 (Moderate) | 74 (Moderate) | 76 (Moderate) | 81 (Moderate) | 82 (Moderate) | 112 (Moderate) | 119 (Moderate) | 105 (Moderate) | 67 (Good) | 50 (Good) | 51 (Good) | 84 (Moderate) | 70 (Moderate) | 76 (Moderate) | 66 (Good) | 71 (Moderate) | 53 (Good) | 83 (Moderate) | 112 (Moderate) | 61 (Good) | 66 (Good) | 41 (Good) | 66 (Good) | 56 (Good) | 79 (Moderate) | 82 (Moderate) | 81 (Moderate) | 78 (Moderate) |
| so2 | 1.7 (Good) | 1.7 (Good) | 4.5 (Good) | 5.9 (Good) | 7.1 (Good) | 7.9 (Good) | 7.6 (Good) | 6.3 (Good) | 5.4 (Good) | 3.2 (Good) | 2.2 (Good) | 4.7 (Good) | 5.9 (Good) | 5.7 (Good) | 5.1 (Good) | 7.4 (Good) | 3.3 (Good) | 6.3 (Good) | 7.8 (Good) | 9 (Good) | 6.8 (Good) | 6.5 (Good) | 6.6 (Good) | 6.6 (Good) | 7.3 (Good) | 7.7 (Good) | 7.4 (Good) | 7.9 (Good) | 7.5 (Good) |
| co | 482 (Good) | 576 (Good) | 511 (Good) | 684 (Good) | 801 (Good) | 680 (Good) | 630 (Good) | 629 (Good) | 483 (Good) | 403 (Good) | 286 (Good) | 202 (Good) | 408 (Good) | 419 (Good) | 560 (Good) | 595 (Good) | 656 (Good) | 502 (Good) | 374 (Good) | 380 (Good) | 448 (Good) | 420 (Good) | 406 (Good) | 472 (Good) | 397 (Good) | 598 (Good) | 524 (Good) | 475 (Good) | 488 (Good) |
| pm10 | 13 (Good) | 27 (Moderate) | 29 (Moderate) | 27 (Moderate) | 30 (Moderate) | 39 (Moderate) | 49 (Moderate) | 44 (Moderate) | 34 (Moderate) | 26 (Moderate) | 24 (Moderate) | 17 (Good) | 26 (Moderate) | 25 (Moderate) | 28 (Moderate) | 26 (Moderate) | 38 (Moderate) | 31 (Moderate) | 32 (Moderate) | 41 (Moderate) | 30 (Moderate) | 23 (Moderate) | 21 (Moderate) | 23 (Moderate) | 23 (Moderate) | 45 (Moderate) | 33 (Moderate) | 39 (Moderate) | 33 (Moderate) |
| pm25 | 8.6 (Good) | 16 (Moderate) | 16 (Moderate) | 15 (Moderate) | 18 (Moderate) | 22 (Moderate) | 24 (Moderate) | 25 (Moderate) | 19 (Moderate) | 15 (Moderate) | 12 (Good) | 8.7 (Good) | 14 (Moderate) | 16 (Moderate) | 16 (Moderate) | 15 (Moderate) | 22 (Moderate) | 17 (Moderate) | 18 (Moderate) | 21 (Moderate) | 17 (Moderate) | 14 (Moderate) | 9.6 (Good) | 13 (Good) | 14 (Moderate) | 23 (Moderate) | 20 (Moderate) | 23 (Moderate) | 20 (Moderate) |
Tap Mun
| 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 | 6.9 | 9 | 11 | 6.3 | 9.2 | 14 | 11 | 7.7 | 5.8 | 8.9 | 6.2 | 9.2 | 9 | 12 | 12 | 9.9 | 18 | 16 | 11 | 11 | 11 | 9.1 | 6.5 | 8.5 | 12 | 11 | 10 | 11 | 11 |
| o3 | 52 | 84 | 74 | 76 | 81 | 82 | 112 | 119 | 105 | 67 | 50 | 51 | 84 | 70 | 76 | 66 | 71 | 53 | 83 | 112 | 61 | 66 | 41 | 66 | 56 | 79 | 82 | 81 | 78 |
| so2 | 1.7 | 1.7 | 4.5 | 5.9 | 7.1 | 7.9 | 7.6 | 6.3 | 5.4 | 3.2 | 2.2 | 4.7 | 5.9 | 5.7 | 5.1 | 7.4 | 3.3 | 6.3 | 7.8 | 9 | 6.8 | 6.5 | 6.6 | 6.6 | 7.3 | 7.7 | 7.4 | 7.9 | 7.5 |
| co | 482 | 576 | 511 | 684 | 801 | 680 | 630 | 629 | 483 | 403 | 286 | 202 | 408 | 419 | 560 | 595 | 656 | 502 | 374 | 380 | 448 | 420 | 406 | 472 | 397 | 598 | 524 | 475 | 488 |
| pm10 | 13 | 27 | 29 | 27 | 30 | 39 | 49 | 44 | 34 | 26 | 24 | 17 | 26 | 25 | 28 | 26 | 38 | 31 | 32 | 41 | 30 | 23 | 21 | 23 | 23 | 45 | 33 | 39 | 33 |
| pm25 | 8.6 | 16 | 16 | 15 | 18 | 22 | 24 | 25 | 19 | 15 | 12 | 8.7 | 14 | 16 | 16 | 15 | 22 | 17 | 18 | 21 | 17 | 14 | 9.6 | 13 | 14 | 23 | 20 | 23 | 20 |
* Pollution data source:
https://openaq.org
(Hong Kong)
The data is licensed under CC-By 4.0