Air Pollution in Yuen Long District: Real-time Air Quality Index and smog alert.

Locations: Shui Pin Wai »
Air pollution in Yuen Long District from January 2018 to May 2020
pollution pm25 hikersbay.com
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)
data source »

Yuen Long

2018-01   2020-05
pollution pm25 hikersbay.com
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

* Pollution data source: https://openaq.org (Hong Kong) The data is licensed under CC-By 4.0