| Country | Period | River Stations | Very negative | Marginally negative | No change | Marginally positive | Very positive | Sen slope (mg O2/l) | Sen slope (%) |
|---|---|---|---|---|---|---|---|---|---|
| Europe | 1992-2015 | 543 | 349 | 25 | 138 | 5 | 26 | -0.080000 | -2.710000 |
| Albania | 1992-2015 | 6 | 1 | 0 | 3 | 0 | 2 | 0.030000 | 0.190000 |
| Austria | 1992-2015 | 46 | 29 | 2 | 15 | 0 | 0 | -0.040000 | -2.580000 |
| Belgium | 1992-2015 | 26 | 9 | 1 | 9 | 0 | 7 | -0.040000 | -0.760000 |
| Bulgaria | 1992-2015 | 66 | 40 | 2 | 24 | 0 | 0 | -0.150000 | -3.020000 |
| Czechia | 1992-2015 | 19 | 14 | 0 | 5 | 0 | 0 | -0.080000 | -2.060000 |
| Denmark | 1992-2015 | 4 | 2 | 0 | 2 | 0 | 0 | -0.030000 | -1.320000 |
| Estonia | 1992-2015 | 48 | 16 | 3 | 19 | 3 | 7 | -0.010000 | -0.470000 |
| Spain | 1992-2015 | 32 | 10 | 6 | 16 | 0 | 0 | -0.150000 | -3.580000 |
| Finland | 1992-2015 | 5 | 3 | 1 | 0 | 0 | 1 | -0.020000 | -1.390000 |
| France | 1992-2015 | 181 | 151 | 6 | 20 | 1 | 3 | -0.090000 | -3.980000 |
| Ireland | 1992-2015 | 3 | 3 | 0 | 0 | 0 | 0 | -0.030000 | -1.730000 |
| Lithuania | 1992-2015 | 24 | 15 | 1 | 4 | 1 | 3 | -0.060000 | -1.560000 |
| Luxembourg | 1992-2015 | 3 | 3 | 0 | 0 | 0 | 0 | -0.140000 | -3.760000 |
| Lithuania | 1992-2015 | 17 | 8 | 2 | 5 | 0 | 2 | -0.010000 | -0.880000 |
| North Macedonia | 1992-2015 | 9 | 0 | 0 | 9 | 0 | 0 | -0.070000 | -0.900000 |
| Sweden | 1992-2015 | 1 | 0 | 0 | 1 | 0 | 0 | -0.030000 | -0.540000 |
| Slovakia | 1992-2015 | 10 | 9 | 0 | 1 | 0 | 0 | -0.140000 | -4.870000 |
| Slovenia | 1992-2015 | 18 | 15 | 1 | 2 | 0 | 0 | -0.080000 | -2.700000 |
| United Kingdom | 1992-2015 | 25 | 21 | 0 | 3 | 0 | 1 | -0.030000 | -2.020000 |
| Europe | 2000-2015 | 1160 | 465 | 71 | 509 | 23 | 92 | -0.050000 | -1.980000 |
| Albania | 2000-2015 | 6 | 1 | 0 | 2 | 1 | 2 | 0.060000 | 1.330000 |
| Austria | 2000-2015 | 48 | 4 | 1 | 32 | 2 | 9 | 0.000000 | 0.400000 |
| Bosnia-Herzegovina | 2000-2015 | 19 | 3 | 0 | 10 | 1 | 5 | 0.010000 | 0.190000 |
| Belgium | 2000-2015 | 36 | 6 | 1 | 14 | 3 | 12 | 0.010000 | 1.130000 |
| Bulgaria | 2000-2015 | 91 | 29 | 7 | 48 | 0 | 7 | -0.070000 | -1.670000 |
| Cyprus | 2000-2015 | 4 | 0 | 1 | 2 | 0 | 1 | 0.030000 | -0.180000 |
| Czechia | 2000-2015 | 19 | 8 | 2 | 9 | 0 | 0 | -0.070000 | -2.020000 |
| Denmark | 2000-2015 | 4 | 1 | 0 | 3 | 0 | 0 | -0.010000 | -0.470000 |
| Estonia | 2000-2015 | 51 | 9 | 1 | 29 | 2 | 10 | 0.000000 | -0.050000 |
| Spain | 2000-2015 | 69 | 5 | 1 | 52 | 0 | 11 | 0.000000 | 1.200000 |
| Finland | 2000-2015 | 6 | 2 | 0 | 4 | 0 | 0 | -0.050000 | -3.220000 |
| France | 2000-2015 | 245 | 170 | 24 | 48 | 1 | 2 | -0.080000 | -5.040000 |
| Croatia | 2000-2015 | 40 | 25 | 2 | 10 | 0 | 3 | -0.060000 | -3.030000 |
| Ireland | 2000-2015 | 54 | 3 | 1 | 37 | 3 | 10 | 0.010000 | 0.820000 |
| Italy | 2000-2015 | 73 | 33 | 4 | 24 | 2 | 10 | -0.040000 | -2.250000 |
| Lithuania | 2000-2015 | 24 | 9 | 3 | 10 | 0 | 2 | -0.040000 | -1.550000 |
| Luxembourg | 2000-2015 | 3 | 2 | 0 | 1 | 0 | 0 | -0.120000 | -4.330000 |
| Latvia | 2000-2015 | 21 | 16 | 2 | 3 | 0 | 0 | -0.050000 | -2.940000 |
| North Macedonia | 2000-2015 | 19 | 11 | 3 | 5 | 0 | 0 | -0.330000 | -4.640000 |
| Poland | 2000-2015 | 103 | 42 | 5 | 52 | 2 | 2 | -0.060000 | -1.570000 |
| Romania | 2000-2015 | 115 | 39 | 10 | 57 | 4 | 5 | -0.070000 | -1.590000 |
| Sweden | 2000-2015 | 1 | 0 | 0 | 1 | 0 | 0 | 0.000000 | -0.060000 |
| Slovenia | 2000-2015 | 10 | 9 | 0 | 1 | 0 | 0 | -0.160000 | -7.440000 |
| Slovakia | 2000-2015 | 18 | 5 | 0 | 13 | 0 | 0 | -0.040000 | -1.500000 |
| United Kingdom | 2000-2015 | 81 | 33 | 3 | 42 | 2 | 1 | -0.020000 | -1.450000 |