| countryName | less than 1.4 mg{O2}/L | 1.4-2.0 mg{O2}/L | 2.0-3.0 mg{O2}/L | 3.0-4.0 mg{O2}/L | greater than 4.0 mg{O2}/L |
|---|---|---|---|---|---|
| United Kingdom (510) | 53 | 34 | 11 | 1 | 0 |
| Sweden (2) | 0 | 0 | 0 | 50 | 50 |
| Spain (1140) | 9 | 5 | 27 | 5 | 54 |
| Slovenia (13) | 100 | 0 | 0 | 0 | 0 |
| Slovakia (18) | 0 | 33 | 44 | 11 | 11 |
| Serbia (37) | 5 | 35 | 49 | 8 | 3 |
| Romania (121) | 12 | 14 | 34 | 18 | 21 |
| Portugal (79) | 38 | 33 | 14 | 4 | 11 |
| Poland (873) | 7 | 25 | 31 | 19 | 18 |
| North Macedonia (20) | 0 | 20 | 40 | 15 | 25 |
| Lithuania (299) | 19 | 41 | 30 | 7 | 2 |
| Latvia (18) | 83 | 17 | 0 | 0 | 0 |
| Kosovo under UNSCR 1244/99 (43) | 0 | 5 | 9 | 9 | 77 |
| Ireland (183) | 95 | 5 | 1 | 0 | 0 |
| Greece (169) | 36 | 9 | 21 | 17 | 17 |
| France (1558) | 62 | 20 | 14 | 3 | 1 |
| Finland (8) | 38 | 38 | 13 | 13 | 0 |
| Estonia (83) | 31 | 46 | 20 | 1 | 1 |
| Czechia (127) | 0 | 20 | 45 | 22 | 13 |
| Cyprus (32) | 84 | 9 | 0 | 0 | 6 |
| Croatia (48) | 65 | 10 | 4 | 8 | 13 |
| Bulgaria (108) | 21 | 27 | 23 | 17 | 12 |
| Belgium (95) | 5 | 37 | 34 | 12 | 13 |
| Europe (5584) | 34 | 20 | 22 | 8 | 17 |