2024 · 41 countries · µg/m³ · lower is better · source: WB
Finland leads; the United States ranks 8 of 41 (7.8 µg/m³).
| # | Country | µg/m³ | Year |
|---|---|---|---|
| 1 | Finland | 4.9 | 2020 |
| 2 | Iceland | 5.1 | 2020 |
| 3 | Sweden | 5.6 | 2020 |
| 4 | Norway | 6.1 | 2020 |
| 5 | Estonia | 6.1 | 2020 |
| 6 | New Zealand | 6.5 | 2020 |
| 7 | Canada | 6.6 | 2020 |
| 8 | United States | 7.8 | 2020 |
| 9 | Ireland | 8.2 | 2020 |
| 10 | Australia | 8.3 | 2020 |
| 11 | Portugal | 8.5 | 2020 |
| 12 | Luxembourg | 8.7 | 2020 |
| 13 | Switzerland | 9.1 | 2020 |
| 14 | Denmark | 9.1 | 2020 |
| 15 | Lithuania | 9.2 | 2020 |
| 16 | Spain | 9.6 | 2020 |
| 17 | France | 9.6 | 2020 |
| 18 | United Kingdom | 9.9 | 2020 |
| 19 | Germany | 10.3 | 2020 |
| 20 | Netherlands | 10.9 | 2020 |
| 21 | Austria | 10.9 | 2020 |
| 22 | Belgium | 11.2 | 2020 |
| 23 | Latvia | 11.6 | 2020 |
| 24 | Brazil | 12.2 | 2020 |
| 25 | Japan | 12.8 | 2020 |
| 26 | Czechia | 14.1 | 2020 |
| 27 | Hungary | 14.1 | 2020 |
| 28 | Slovenia | 14.3 | 2020 |
| 29 | Costa Rica | 14.3 | 2020 |
| 30 | Greece | 14.4 | 2020 |
| 31 | Italy | 14.7 | 2020 |
| 32 | Romania | 14.9 | 2020 |
| 33 | Mexico | 15.0 | 2020 |
| 34 | Slovak Republic | 15.4 | 2020 |
| 35 | Croatia | 16.1 | 2020 |
| 36 | Bulgaria | 17.1 | 2020 |
| 37 | Poland | 18.0 | 2020 |
| 38 | Israel | 18.6 | 2020 |
| 39 | Turkiye | 21.6 | 2020 |
| 40 | Chile | 23.3 | 2020 |
| 41 | Korea, Rep. | 25.9 | 2020 |