| 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 (986) | 51 | 32 | 10 | 4 | 3 |
| Switzerland (100) | 54 | 36 | 7 | 3 | 0 |
| Sweden (125) | 72 | 22 | 3 | 2 | 2 |
| Spain (1658) | 11 | 52 | 19 | 11 | 7 |
| Slovenia (13) | 85 | 15 | 0 | 0 | 0 |
| Slovakia (18) | 11 | 50 | 22 | 17 | 0 |
| Serbia (37) | 11 | 41 | 46 | 3 | 0 |
| Romania (119) | 26 | 34 | 18 | 8 | 13 |
| Portugal (77) | 38 | 26 | 19 | 10 | 6 |
| Poland (121) | 24 | 36 | 31 | 9 | 0 |
| Norway (63) | 98 | 2 | 0 | 0 | 0 |
| North Macedonia (20) | 25 | 20 | 25 | 20 | 10 |
| Netherlands (104) | 1 | 14 | 20 | 46 | 18 |
| Lithuania (299) | 31 | 50 | 14 | 2 | 3 |
| Latvia (18) | 0 | 100 | 0 | 0 | 0 |
| Kosovo under UNSCR 1244/99 (47) | 11 | 9 | 2 | 15 | 64 |
| Ireland (183) | 83 | 14 | 3 | 1 | 0 |
| Iceland (3) | 100 | 0 | 0 | 0 | 0 |
| Greece (188) | 59 | 20 | 7 | 7 | 6 |
| Germany (234) | 21 | 56 | 16 | 5 | 3 |
| France (1558) | 63 | 27 | 6 | 2 | 1 |
| Finland (110) | 91 | 8 | 0 | 1 | 0 |
| Estonia (85) | 75 | 20 | 4 | 0 | 1 |
| Czechia (127) | 6 | 37 | 35 | 16 | 7 |
| Cyprus (33) | 70 | 18 | 0 | 6 | 6 |
| Croatia (48) | 75 | 19 | 2 | 2 | 2 |
| Bulgaria (108) | 22 | 36 | 21 | 12 | 8 |
| Belgium (95) | 20 | 12 | 15 | 19 | 35 |
| Europe (6577) | 40 | 35 | 13 | 7 | 5 |