| countryName | less than 40 µg N/l | 40-100 µg N/l | 100-200 µg N/l | 200-400 µg N/l | greater than 400 µg N/l |
|---|---|---|---|---|---|
| United Kingdom (1105) | 47 | 35 | 10 | 4 | 3 |
| North Macedonia (21) | 14 | 24 | 29 | 14 | 19 |
| Sweden (125) | 72 | 22 | 3 | 2 | 2 |
| Spain (1883) | 9 | 55 | 17 | 12 | 7 |
| Slovenia (16) | 75 | 25 | 0 | 0 | 0 |
| Slovakia (52) | 17 | 46 | 25 | 8 | 4 |
| Serbia (39) | 13 | 38 | 38 | 8 | 3 |
| Romania (129) | 21 | 26 | 21 | 11 | 21 |
| Portugal (78) | 37 | 26 | 19 | 10 | 8 |
| Poland (124) | 15 | 44 | 27 | 14 | 0 |
| Norway (46) | 98 | 2 | 0 | 0 | 0 |
| Netherlands (12) | 17 | 58 | 8 | 17 | 0 |
| Lithuania (367) | 19 | 58 | 15 | 5 | 2 |
| Latvia (21) | 0 | 95 | 5 | 0 | 0 |
| Kosovo under UNSCR 1244/99 (47) | 0 | 4 | 0 | 23 | 72 |
| Iceland (3) | 100 | 0 | 0 | 0 | 0 |
| Greece (345) | 61 | 19 | 8 | 4 | 8 |
| Germany (240) | 20 | 52 | 21 | 5 | 3 |
| France (1560) | 65 | 26 | 6 | 2 | 1 |
| Finland (117) | 92 | 6 | 1 | 1 | 0 |
| Estonia (197) | 66 | 24 | 7 | 1 | 2 |
| Czechia (121) | 8 | 40 | 29 | 16 | 7 |
| Cyprus (36) | 72 | 19 | 0 | 6 | 3 |
| Croatia (48) | 58 | 27 | 10 | 2 | 2 |
| Bulgaria (97) | 30 | 36 | 20 | 10 | 4 |
| Belgium (94) | 20 | 14 | 13 | 11 | 43 |
| Austria (71) | 70 | 21 | 6 | 3 | 0 |