| 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 (483) | 58 | 31 | 9 | 1 | 0 |
| Spain (1058) | 12 | 4 | 57 | 5 | 22 |
| Slovenia (16) | 100 | 0 | 0 | 0 | 0 |
| Slovakia (16) | 0 | 50 | 38 | 6 | 6 |
| Serbia (36) | 3 | 33 | 47 | 11 | 6 |
| Romania (121) | 7 | 23 | 26 | 22 | 21 |
| Portugal (92) | 20 | 46 | 16 | 10 | 9 |
| Poland (515) | 6 | 20 | 37 | 23 | 14 |
| North Macedonia (20) | 5 | 5 | 35 | 15 | 40 |
| Lithuania (299) | 13 | 39 | 35 | 8 | 4 |
| Latvia (19) | 74 | 26 | 0 | 0 | 0 |
| Kosovo (47) | 6 | 13 | 9 | 0 | 72 |
| Italy (1198) | 44 | 20 | 18 | 7 | 12 |
| Ireland (181) | 93 | 6 | 1 | 1 | 0 |
| Germany (156) | 29 | 26 | 30 | 9 | 6 |
| Finland (10) | 50 | 30 | 10 | 10 | 0 |
| Estonia (91) | 38 | 45 | 15 | 1 | 0 |
| Czechia (826) | 11 | 23 | 32 | 15 | 19 |
| Cyprus (25) | 84 | 4 | 4 | 0 | 8 |
| Croatia (48) | 65 | 10 | 8 | 4 | 13 |
| Bulgaria (109) | 21 | 26 | 33 | 10 | 10 |
| Belgium (97) | 12 | 36 | 31 | 9 | 11 |
| Austria (77) | 40 | 34 | 23 | 3 | 0 |
| Albania (26) | 0 | 0 | 0 | 0 | 100 |
| Europe (5566) | 28 | 20 | 30 | 9 | 14 |