| Country | Period | River Stations | Very negative | Marginally negative | No change | Marginally positive | Very positive | Sen slope (mg N/m3) | Sen slope (%) |
|---|---|---|---|---|---|---|---|---|---|
| Europe | 1992-2012 | 799 | 469 (59%) | 37 (5%) | 263 (33%) | 9 (1%) | 21 (3%) | -11.600000 | -3.500000 |
| Austria | 1992-2012 | 47 | 30 (64%) | 1 (2%) | 16 (34%) | 0 (0%) | 0 (0%) | -6.000000 | -4.200000 |
| Belgium | 1992-2012 | 27 | 16 (59%) | 3 (11%) | 7 (26%) | 1 (4%) | 0 (0%) | -66.340000 | -4.300000 |
| Bulgaria | 1992-2012 | 67 | 46 (69%) | 2 (3%) | 17 (25%) | 1 (1%) | 1 (1%) | -35.620000 | -5.100000 |
| Estonia | 1992-2012 | 53 | 21 (40%) | 2 (4%) | 27 (51%) | 2 (4%) | 1 (2%) | -2.240000 | -1.700000 |
| Finland | 1992-2012 | 85 | 34 (40%) | 6 (7%) | 42 (49%) | 1 (1%) | 2 (2%) | -1.040000 | -1.700000 |
| France | 1992-2012 | 166 | 114 (69%) | 5 (3%) | 41 (25%) | 2 (1%) | 4 (2%) | -10.490000 | -4.300000 |
| FYR of Macedonia | 1992-2012 | 9 | 9 (100%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | -20.370000 | -4.500000 |
| Germany | 1992-2012 | 136 | 120 (88%) | 6 (4%) | 9 (7%) | 0 (0%) | 1 (1%) | -14.290000 | -5.400000 |
| Ireland | 1992-2012 | 4 | 2 (50%) | 1 (25%) | 1 (25%) | 0 (0%) | 0 (0%) | -1.100000 | -2.400000 |
| Latvia | 1992-2012 | 16 | 8 (50%) | 0 (0%) | 8 (50%) | 0 (0%) | 0 (0%) | -2.350000 | -2.100000 |
| Liechtenstein | 1992-2012 | 13 | 4 (31%) | 0 (0%) | 7 (54%) | 0 (0%) | 2 (15%) | 1.090000 | 0.900000 |
| Lithuania | 1992-2012 | 26 | 21 (81%) | 2 (8%) | 3 (12%) | 0 (0%) | 0 (0%) | -13.690000 | -6.900000 |
| Luxembourg | 1992-2012 | 3 | 2 (67%) | 1 (33%) | 0 (0%) | 0 (0%) | 0 (0%) | -19.180000 | -3.700000 |
| Norway | 1992-2012 | 10 | 5 (50%) | 2 (20%) | 3 (30%) | 0 (0%) | 0 (0%) | -0.450000 | -3.000000 |
| Poland | 1992-2012 | 4 | 2 (50%) | 1 (25%) | 1 (25%) | 0 (0%) | 0 (0%) | -10.260000 | -3.700000 |
| Slovenia | 1992-2012 | 13 | 11 (85%) | 2 (15%) | 0 (0%) | 0 (0%) | 0 (0%) | -11.220000 | -7.300000 |
| Sweden | 1992-2012 | 108 | 13 (12%) | 2 (2%) | 81 (75%) | 2 (2%) | 10 (9%) | -0.250000 | -0.200000 |
| United Kingdom | 1992-2012 | 12 | 11 (92%) | 1 (8%) | 0 (0%) | 0 (0%) | 0 (0%) | -3.910000 | -4.500000 |
| Europe | 2000-2012 | 1336 | 465 (35%) | 106 (8%) | 678 (51%) | 24 (2%) | 63 (5%) | -0.011585 | -3.685040 |
| Austria | 2000-2012 | 49 | 17 (35%) | 4 (8%) | 23 (47%) | 2 (4%) | 3 (6%) | -0.004400 | -2.947373 |
| Belgium | 2000-2012 | 36 | 12 (33%) | 4 (11%) | 20 (56%) | 0 (0%) | 0 (0%) | -0.041480 | -3.260771 |
| Bosnia-Herzegovina | 2000-2012 | 7 | 0 (0%) | 0 (0%) | 5 (71%) | 1 (14%) | 1 (14%) | 0.001764 | 3.057079 |
| Bulgaria | 2000-2012 | 88 | 23 (26%) | 6 (7%) | 50 (57%) | 5 (6%) | 4 (5%) | -0.029840 | -2.808069 |
| Croatia | 2000-2012 | 37 | 18 (49%) | 3 (8%) | 12 (32%) | 0 (0%) | 4 (11%) | -0.003960 | -3.741856 |
| Estonia | 2000-2012 | 53 | 6 (11%) | 1 (2%) | 35 (66%) | 3 (6%) | 8 (15%) | -0.000341 | -0.187690 |
| Finland | 2000-2012 | 100 | 15 (15%) | 5 (5%) | 74 (74%) | 2 (2%) | 4 (4%) | -0.000514 | -1.113050 |
| France | 2000-2012 | 243 | 103 (42%) | 26 (11%) | 108 (44%) | 1 (0%) | 5 (2%) | -0.009384 | -4.987449 |
| Germany | 2000-2012 | 139 | 65 (47%) | 8 (6%) | 61 (44%) | 1 (1%) | 4 (3%) | -0.005145 | -3.536860 |
| Iceland | 2000-2012 | 1 | 0 (0%) | 0 (0%) | 1 (100%) | 0 (0%) | 0 (0%) | 0.000125 | 0.864362 |
| Ireland | 2000-2012 | 35 | 1 (3%) | 1 (3%) | 28 (80%) | 0 (0%) | 5 (14%) | -0.000502 | -0.571721 |
| Italy | 2000-2012 | 155 | 57 (37%) | 8 (5%) | 72 (46%) | 4 (3%) | 14 (9%) | -0.014194 | -3.997379 |
| Latvia | 2000-2012 | 19 | 3 (16%) | 0 (0%) | 12 (63%) | 2 (11%) | 2 (11%) | -0.000623 | -0.314388 |
| Liechtenstein | 2000-2012 | 14 | 4 (29%) | 2 (14%) | 7 (50%) | 0 (0%) | 1 (7%) | -0.002986 | -1.382980 |
| Lithuania | 2000-2012 | 28 | 5 (18%) | 0 (0%) | 19 (68%) | 0 (0%) | 4 (14%) | -0.001101 | -0.387186 |
| Luxembourg | 2000-2012 | 3 | 0 (0%) | 1 (33%) | 2 (67%) | 0 (0%) | 0 (0%) | 0.004654 | -2.956985 |
| Former Yugoslav Republic of Macedonia | 2000-2012 | 19 | 10 (53%) | 1 (5%) | 7 (37%) | 1 (5%) | 0 (0%) | -0.024245 | -5.129837 |
| Norway | 2000-2012 | 10 | 4 (40%) | 1 (10%) | 5 (50%) | 0 (0%) | 0 (0%) | -0.000434 | -4.062696 |
| Poland | 2000-2012 | 10 | 0 (0%) | 4 (40%) | 5 (50%) | 0 (0%) | 1 (10%) | -0.003848 | -2.142496 |
| Romania | 2000-2012 | 117 | 65 (56%) | 17 (15%) | 34 (29%) | 0 (0%) | 1 (1%) | -0.038157 | -8.739337 |
| Serbia | 2000-2012 | 37 | 17 (46%) | 1 (3%) | 19 (51%) | 0 (0%) | 0 (0%) | -0.012588 | -5.755940 |
| Slovenia | 2000-2012 | 14 | 6 (43%) | 1 (7%) | 7 (50%) | 0 (0%) | 0 (0%) | -0.009460 | -4.973400 |
| Sweden | 2000-2012 | 110 | 24 (22%) | 11 (10%) | 71 (65%) | 2 (2%) | 2 (2%) | -0.000442 | -2.184243 |
| United Kingdom | 2000-2012 | 12 | 10 (83%) | 1 (8%) | 1 (8%) | 0 (0%) | 0 (0%) | -0.003440 | -6.978877 |