index | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
no2 | 20 (Good) | 28 (Good) | 31 (Good) | 21 (Good) | 18 (Good) | 22 (Good) | 18 (Good) | 17 (Good) | 14 (Good) | 14 (Good) | 13 (Good) | 17 (Good) | 22 (Good) | 26 (Good) |
o3 | 66 (Good) | 84 (Moderate) | 53 (Good) | 47 (Good) | 48 (Good) | 40 (Good) | 43 (Good) | 44 (Good) | 59 (Good) | 59 (Good) | 59 (Good) | 51 (Good) | 52 (Good) | 53 (Good) |
pm25 | 15 (Moderate) | 26 (Moderate) | 18 (Moderate) | 12 (Good) | 11 (Good) | 10 (Good) | 9.4 (Good) | 9.1 (Good) | 6.3 (Good) | 7.8 (Good) | 11 (Good) | 12 (Good) | 10 (Good) | 18 (Moderate) |