| Country | PM2.5 concentrations |
|---|---|
| Finland | 6.6 |
| Sweden | 7.3 |
| Estonia | 7.8 |
| Portugal | 8.9 |
| Spain | 9.9 |
| Lithuania | 10.5 |
| Ireland | 10.8 |
| Malta | 11.0 |
| Denmark | 12.1 |
| United Kingdom | 12.8 |
| Luxembourg | 14.1 |
| Latvia | 14.4 |
| Netherlands | 14.7 |
| Germany | 15.1 |
| France | 16.1 |
| Belgium | 16.3 |
| Greece | 16.7 |
| Austria | 16.9 |
| Romania | 18.7 |
| Hungary | 20.5 |
| Italy | 21.0 |
| Slovenia | 21.2 |
| Czech Republic | 21.4 |
| Cyprus | 21.5 |
| Slovakia | 22.3 |
| Poland | 27.0 |
| Bulgaria | 30.1 |