| 2021 1 - 3 | 81.7 % 1.8 | 12 | 100.0 % 94.4 % 93.3 % 90.0 % | 82.2 % 81.1 % 80.0 % 76.7 % | 76.7 % 71.1% 67.8% 67.8% | PM 2.5 31 \ | 29.5 % 12 PM 2.5 | 12 \ 20 \ | 24 \ 26 \ 29 | \ 31 \ 32 \ | 34 \ 37 \ 41 \ | 42 \ 45 \ | 12 | | | | |