PM2.5 air pollution, mean annual exposure (micrograms per cubic meter)
| 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
| ブルネイ·ダルサラーム国 | 8.37 | 7.15 | 7.17 | 6.29 | 7.23 | 7.64 | 7.81 | 8.04 | 7.77 | 7.71 | 7.23 | 7.49 | 7.95 | 7.60 |
| カンボジア | 30.87 | 29.80 | 29.99 | 24.82 | 21.68 | 23.00 | 25.78 | 22.11 | 21.60 | 22.41 | 20.71 | 22.99 | 22.97 | 24.14 |
| 中国 | 49.30 | 50.30 | 51.48 | 47.48 | 51.35 | 48.12 | 58.47 | 54.57 | 50.83 | 46.83 | 45.84 | 40.27 | 37.55 | 34.81 |
| インドネシア | 29.84 | 26.21 | 24.39 | 20.60 | 17.92 | 19.55 | 20.10 | 18.54 | 18.67 | 19.13 | 16.96 | 18.44 | 19.43 | 17.88 |
| 日本 | 13.37 | 13.16 | 12.32 | 10.85 | 12.27 | 12.81 | 13.25 | 13.74 | 12.87 | 12.80 | 13.12 | 13.08 | 12.94 | 12.84 |
| 大韓民国 | 25.98 | 25.44 | 24.47 | 21.79 | 24.88 | 25.58 | 27.49 | 28.38 | 26.29 | 26.67 | 26.00 | 25.93 | 26.02 | 25.94 |
| ラオス人民民主共和国 | 29.69 | 28.82 | 28.78 | 24.23 | 20.58 | 22.44 | 24.24 | 21.39 | 20.17 | 22.46 | 19.15 | 20.98 | 22.43 | 22.32 |
| マレーシア | 31.53 | 23.51 | 22.72 | 17.57 | 16.55 | 17.91 | 18.80 | 17.11 | 16.93 | 16.39 | 14.95 | 16.65 | 17.82 | 16.19 |
| ミャンマー | 41.65 | 39.53 | 41.01 | 34.31 | 29.49 | 33.18 | 35.17 | 31.22 | 29.92 | 31.17 | 28.13 | 31.56 | 32.16 | 32.32 |
| フィリピン | 33.40 | 31.52 | 29.94 | 23.03 | 20.28 | 21.84 | 22.74 | 20.34 | 19.71 | 19.91 | 18.33 | 20.59 | 21.53 | 20.29 |
| シンガポール | 35.03 | 19.80 | 16.22 | 13.80 | 15.50 | 16.92 | 18.08 | 17.28 | 17.18 | 15.90 | 16.08 | 15.98 | 17.08 | 13.87 |
| タイ | 44.30 | 40.39 | 40.32 | 33.47 | 29.06 | 31.59 | 34.49 | 29.97 | 28.15 | 30.40 | 27.10 | 30.01 | 30.38 | 31.01 |
| ベトナム | 28.61 | 27.23 | 27.36 | 23.08 | 20.49 | 21.51 | 23.23 | 20.40 | 19.38 | 20.33 | 18.58 | 20.16 | 20.83 | 20.80 |