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) | 35 (Good) | 33 (Good) | 36 (Good) | 46 (Moderate) | 63 (Moderate) | 55 (Moderate) | 45 (Moderate) | 47 (Moderate) | 38 (Good) | 28 (Good) | 28 (Good) | 33 (Good) | 40 (Good) | 46 (Moderate) | 41 (Moderate) | 67 (Moderate) | 49 (Moderate) | 48 (Moderate) | 49 (Moderate) | 43 (Moderate) | 40 (Moderate) | 28 (Good) | 36 (Good) | 33 (Good) | 43 (Moderate) | 46 (Moderate) | 52 (Moderate) | 52 (Moderate) |
o3 | 33 (Good) | 51 (Good) | 46 (Good) | 43 (Good) | 45 (Good) | 45 (Good) | 73 (Moderate) | 82 (Moderate) | 74 (Moderate) | 53 (Good) | 40 (Good) | 38 (Good) | 57 (Good) | 50 (Good) | 49 (Good) | 41 (Good) | 39 (Good) | 29 (Good) | 46 (Good) | 69 (Good) | 43 (Good) | 47 (Good) | 27 (Good) | 47 (Good) | 40 (Good) | 42 (Good) | 51 (Good) | 38 (Good) | 39 (Good) |
so2 | 5.2 (Good) | 5.2 (Good) | 4.3 (Good) | 4 (Good) | 4.7 (Good) | 7.5 (Good) | 6.7 (Good) | 5.2 (Good) | 5.3 (Good) | 6.9 (Good) | 5.6 (Good) | 4.5 (Good) | 3.4 (Good) | 3.2 (Good) | 2.5 (Good) | 3.3 (Good) | 7.1 (Good) | 7.6 (Good) | 6.1 (Good) | 7.1 (Good) | 8.3 (Good) | 7.4 (Good) | 7.2 (Good) | 7.3 (Good) | 8.8 (Good) | 9.8 (Good) | 9.1 (Good) | 9.2 (Good) | 9.2 (Good) |
co | 526 (Good) | 564 (Good) | 624 (Good) | 653 (Good) | 742 (Good) | 735 (Good) | 695 (Good) | 668 (Good) | 526 (Good) | 512 (Good) | 597 (Good) | 485 (Good) | 394 (Good) | 431 (Good) | 561 (Good) | 690 (Good) | 867 (Good) | 781 (Good) | 785 (Good) | 668 (Good) | 573 (Good) | 650 (Good) | 570 (Good) | 348 (Good) | 296 (Good) | 532 (Good) | 561 (Good) | 586 (Good) | 498 (Good) |
pm10 | 21 (Moderate) | 35 (Moderate) | 31 (Moderate) | 29 (Moderate) | 34 (Moderate) | 58 (Unhealthy for Sensitive Groups) | 65 (Unhealthy for Sensitive Groups) | 53 (Unhealthy for Sensitive Groups) | 40 (Moderate) | 26 (Moderate) | 23 (Moderate) | 15 (Good) | 26 (Moderate) | 25 (Moderate) | 33 (Moderate) | 28 (Moderate) | 52 (Unhealthy for Sensitive Groups) | 38 (Moderate) | 46 (Moderate) | 54 (Unhealthy for Sensitive Groups) | 34 (Moderate) | 26 (Moderate) | 16 (Good) | 21 (Moderate) | 22 (Moderate) | 45 (Moderate) | 37 (Moderate) | 50 (Moderate) | 47 (Moderate) |
pm25 | 12 (Good) | 17 (Moderate) | 16 (Moderate) | 16 (Moderate) | 20 (Moderate) | 26 (Moderate) | 28 (Moderate) | 28 (Moderate) | 23 (Moderate) | 16 (Moderate) | 14 (Moderate) | 9.8 (Good) | 15 (Moderate) | 16 (Moderate) | 17 (Moderate) | 13 (Good) | 32 (Moderate) | 20 (Moderate) | 22 (Moderate) | 26 (Moderate) | 19 (Moderate) | 17 (Moderate) | 8.4 (Good) | 12 (Good) | 10 (Good) | 23 (Moderate) | 23 (Moderate) | 34 (Moderate) | 27 (Moderate) |
Yuen Long
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 | 35 | 33 | 36 | 46 | 63 | 55 | 45 | 47 | 38 | 28 | 28 | 33 | 40 | 46 | 41 | 67 | 49 | 48 | 49 | 43 | 40 | 28 | 36 | 33 | 43 | 46 | 52 | 52 |
o3 | 33 | 51 | 46 | 43 | 45 | 45 | 73 | 82 | 74 | 53 | 40 | 38 | 57 | 50 | 49 | 41 | 39 | 29 | 46 | 69 | 43 | 47 | 27 | 47 | 40 | 42 | 51 | 38 | 39 |
so2 | 5.2 | 5.2 | 4.3 | 4 | 4.7 | 7.5 | 6.7 | 5.2 | 5.3 | 6.9 | 5.6 | 4.5 | 3.4 | 3.2 | 2.5 | 3.3 | 7.1 | 7.6 | 6.1 | 7.1 | 8.3 | 7.4 | 7.2 | 7.3 | 8.8 | 9.8 | 9.1 | 9.2 | 9.2 |
co | 526 | 564 | 624 | 653 | 742 | 735 | 695 | 668 | 526 | 512 | 597 | 485 | 394 | 431 | 561 | 690 | 867 | 781 | 785 | 668 | 573 | 650 | 570 | 348 | 296 | 532 | 561 | 586 | 498 |
pm10 | 21 | 35 | 31 | 29 | 34 | 58 | 65 | 53 | 40 | 26 | 23 | 15 | 26 | 25 | 33 | 28 | 52 | 38 | 46 | 54 | 34 | 26 | 16 | 21 | 22 | 45 | 37 | 50 | 47 |
pm25 | 12 | 17 | 16 | 16 | 20 | 26 | 28 | 28 | 23 | 16 | 14 | 9.8 | 15 | 16 | 17 | 13 | 32 | 20 | 22 | 26 | 19 | 17 | 8.4 | 12 | 10 | 23 | 23 | 34 | 27 |