| 2021 1 7 | 85.2% 1.9 | 68. | 1% 42.0 12 | 99.5% 96.7% | 94.3% 92.0% 88.7% 83.5% | 83.0% 79.2% 78.8% 77.8% 76.9% | 71.7% | PM2.5 24 / 20. | 0% 12 PM2.5 | 10 / 17 / 21 / | 22 / 22 / 25 | / 25 / 26 / 26 | / 28 / 30 / 30 | / | 12 | | | | | |