| Country | Period | River Stations | Very negative | Marginally negative | No change | Marginally positive | Very positive | Sen slope (mg O2/l) | Sen slope (%) |
|---|---|---|---|---|---|---|---|---|---|
| Europe | 1992-2012 | 539 | 332 (62%) | 30 (6%) | 156 (29%) | 5 (1%) | 16 (3%) | -0.100000 | -2.900000 |
| Austria | 1992-2012 | 47 | 28 (60%) | 3 (6%) | 16 (34%) | 0 (0%) | 0 (0%) | -0.100000 | -3.300000 |
| Belgium | 1992-2012 | 25 | 9 (36%) | 2 (8%) | 13 (52%) | 0 (0%) | 1 (4%) | -0.100000 | -1.800000 |
| Bulgaria | 1992-2012 | 73 | 41 (56%) | 7 (10%) | 25 (34%) | 0 (0%) | 0 (0%) | -0.200000 | -3.500000 |
| Denmark | 1992-2012 | 34 | 24 (71%) | 1 (3%) | 9 (26%) | 0 (0%) | 0 (0%) | 0.000000 | -2.200000 |
| Estonia | 1992-2012 | 53 | 19 (36%) | 2 (4%) | 20 (38%) | 4 (8%) | 8 (15%) | -0.010000 | -0.500000 |
| Finland | 1992-2012 | 14 | 6 (43%) | 1 (7%) | 6 (43%) | 0 (0%) | 1 (7%) | -0.010000 | -0.800000 |
| France | 1992-2012 | 183 | 142 (78%) | 7 (4%) | 33 (18%) | 0 (0%) | 1 (1%) | -0.100000 | -4.100000 |
| FYR of Macedonia | 1992-2012 | 9 | 0 (0%) | 0 (0%) | 9 (100%) | 0 (0%) | 0 (0%) | 0.010000 | 0.400000 |
| Ireland | 1992-2012 | 3 | 3 (100%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | -0.030000 | -2.100000 |
| Latvia | 1992-2012 | 16 | 3 (19%) | 1 (6%) | 11 (69%) | 0 (0%) | 1 (6%) | -0.010000 | -0.600000 |
| Lithuania | 1992-2012 | 27 | 15 (56%) | 2 (7%) | 6 (22%) | 1 (4%) | 3 (11%) | -0.050000 | -1.300000 |
| Luxembourg | 1992-2012 | 3 | 2 (67%) | 1 (33%) | 0 (0%) | 0 (0%) | 0 (0%) | -0.160000 | -4.100000 |
| Slovakia | 1992-2012 | 15 | 11 (73%) | 2 (13%) | 2 (13%) | 0 (0%) | 0 (0%) | -0.090000 | -3.100000 |
| Slovenia | 1992-2012 | 13 | 12 (92%) | 0 (0%) | 1 (8%) | 0 (0%) | 0 (0%) | -0.130000 | -4.600000 |
| United Kingdom | 1992-2012 | 24 | 17 (71%) | 1 (4%) | 5 (21%) | 0 (0%) | 1 (4%) | -0.030000 | -2.200000 |
| Europe | 2000-2012 | 1235 | 416 (34%) | 95 (8%) | 625 (51%) | 30 (2%) | 69 (6%) | -0.066000 | -2.500000 |
| Austria | 2000-2012 | 49 | 6 (12%) | 2 (4%) | 29 (59%) | 4 (8%) | 8 (16%) | 0.002000 | 0.900000 |
| Belgium | 2000-2012 | 36 | 8 (22%) | 0 (0%) | 21 (58%) | 6 (17%) | 1 (3%) | -0.022000 | -0.500000 |
| Bosnia-Herzegovina | 2000-2012 | 13 | 0 (0%) | 0 (0%) | 8 (62%) | 3 (23%) | 2 (15%) | 0.036000 | 1.700000 |
| Bulgaria | 2000-2012 | 91 | 16 (18%) | 10 (11%) | 57 (63%) | 1 (1%) | 7 (8%) | -0.106000 | -2.200000 |
| Croatia | 2000-2012 | 37 | 26 (70%) | 2 (5%) | 9 (24%) | 0 (0%) | 0 (0%) | -0.116000 | -5.300000 |
| Denmark | 2000-2012 | 38 | 20 (53%) | 1 (3%) | 16 (42%) | 0 (0%) | 1 (3%) | -0.040000 | -2.900000 |
| Estonia | 2000-2012 | 53 | 8 (15%) | 1 (2%) | 32 (60%) | 5 (9%) | 7 (13%) | -0.002000 | 0.000000 |
| Finland | 2000-2012 | 34 | 11 (32%) | 1 (3%) | 18 (53%) | 1 (3%) | 3 (9%) | -0.010000 | -1.600000 |
| France | 2000-2012 | 246 | 137 (56%) | 30 (12%) | 77 (31%) | 1 (0%) | 1 (0%) | -0.099000 | -5.700000 |
| Ireland | 2000-2012 | 54 | 2 (4%) | 1 (2%) | 43 (80%) | 3 (6%) | 5 (9%) | 0.003000 | 0.500000 |
| Italy | 2000-2012 | 165 | 64 (39%) | 12 (7%) | 70 (42%) | 2 (1%) | 17 (10%) | -0.047000 | -2.300000 |
| Latvia | 2000-2012 | 19 | 5 (26%) | 1 (5%) | 13 (68%) | 0 (0%) | 0 (0%) | -0.040000 | -2.400000 |
| Lithuania | 2000-2012 | 28 | 8 (29%) | 0 (0%) | 16 (57%) | 0 (0%) | 4 (14%) | -0.035000 | -1.000000 |
| Luxembourg | 2000-2012 | 3 | 2 (67%) | 1 (33%) | 0 (0%) | 0 (0%) | 0 (0%) | -0.186000 | -6.400000 |
| Former Yugoslav Republic of Macedonia | 2000-2012 | 19 | 5 (26%) | 2 (11%) | 11 (58%) | 1 (5%) | 0 (0%) | -0.390000 | -4.000000 |
| Poland | 2000-2012 | 106 | 30 (28%) | 9 (8%) | 60 (57%) | 2 (2%) | 5 (5%) | -0.061000 | -1.600000 |
| Romania | 2000-2012 | 116 | 30 (26%) | 10 (9%) | 75 (65%) | 0 (0%) | 1 (1%) | -0.096000 | -2.400000 |
| Slovakia | 2000-2012 | 15 | 4 (27%) | 1 (7%) | 10 (67%) | 0 (0%) | 0 (0%) | -0.060000 | -2.100000 |
| Slovenia | 2000-2012 | 14 | 10 (71%) | 1 (7%) | 3 (21%) | 0 (0%) | 0 (0%) | -0.183000 | -7.300000 |
| United Kingdom | 2000-2012 | 99 | 24 (24%) | 10 (10%) | 57 (58%) | 1 (1%) | 7 (7%) | -0.022000 | -1.100000 |