| Country | Period | River-water bodies | Very negative | Marginally negative | No change | Marginally positive | Very positive | Sen slope (mg/l NO3) | Sen slope (%) |
|---|---|---|---|---|---|---|---|---|---|
| Europe | 1992-2015 | 1076 | 488 | 52 | 392 | 29 | 115 | -0.021000 | -0.800000 |
| Albania | 1992-2015 | 6 | 3 | 0 | 3 | 0 | 0 | -0.014000 | -1.800000 |
| Austria | 1992-2015 | 46 | 17 | 3 | 17 | 4 | 5 | -0.016000 | -0.600000 |
| Belgium | 1992-2015 | 28 | 15 | 2 | 9 | 1 | 1 | -0.046000 | -1.100000 |
| Bulgaria | 1992-2015 | 64 | 23 | 8 | 30 | 0 | 3 | -0.031000 | -1.600000 |
| Czech Republic | 1992-2015 | 19 | 15 | 2 | 1 | 0 | 1 | -0.041000 | -1.400000 |
| Denmark | 1992-2015 | 37 | 36 | 0 | 1 | 0 | 0 | -0.152000 | -3.100000 |
| Estonia | 1992-2015 | 48 | 6 | 0 | 12 | 4 | 26 | 0.017000 | 1.000000 |
| Finland | 1992-2015 | 78 | 17 | 3 | 36 | 2 | 20 | 0.002000 | 0.000000 |
| France | 1992-2015 | 187 | 50 | 11 | 98 | 5 | 23 | -0.007000 | -0.400000 |
| Germany | 1992-2015 | 133 | 114 | 3 | 16 | 0 | 0 | -0.057000 | -1.700000 |
| Ireland | 1992-2015 | 4 | 1 | 0 | 3 | 0 | 0 | 0.000000 | -0.700000 |
| Latvia | 1992-2015 | 17 | 11 | 0 | 6 | 0 | 0 | -0.018000 | -2.400000 |
| Lithuania | 1992-2015 | 24 | 2 | 1 | 15 | 1 | 5 | 0.016000 | 0.400000 |
| Norway | 1992-2015 | 45 | 18 | 2 | 19 | 2 | 4 | 0.000000 | -0.800000 |
| Poland | 1992-2015 | 13 | 3 | 0 | 6 | 0 | 4 | -0.005000 | -0.100000 |
| Slovakia | 1992-2015 | 18 | 11 | 2 | 5 | 0 | 0 | -0.022000 | -1.300000 |
| Slovenia | 1992-2015 | 10 | 5 | 0 | 4 | 1 | 0 | -0.006000 | -0.500000 |
| Spain | 1992-2015 | 63 | 15 | 4 | 32 | 3 | 9 | 0.005000 | -0.300000 |
| Sweden | 1992-2015 | 118 | 63 | 6 | 45 | 1 | 3 | -0.008000 | -1.100000 |
| Switzerland | 1992-2015 | 6 | 2 | 0 | 2 | 0 | 2 | -0.004000 | -0.100000 |
| United Kingdom | 1992-2015 | 112 | 61 | 5 | 32 | 5 | 9 | -0.027000 | -0.900000 |
| Europe | 2000-2015 | 1623 | 530 | 121 | 808 | 48 | 116 | -0.018000 | -1.000000 |
| Albania | 2000-2015 | 14 | 8 | 1 | 5 | 0 | 0 | -0.046000 | -6.000000 |
| Austria | 2000-2015 | 48 | 10 | 3 | 25 | 5 | 5 | -0.003000 | 0.000000 |
| Belgium | 2000-2015 | 36 | 15 | 0 | 20 | 1 | 0 | -0.055000 | -1.400000 |
| Bosnia and Herzegovina | 2000-2015 | 19 | 3 | 1 | 11 | 1 | 3 | 0.003000 | 0.100000 |
| Bulgaria | 2000-2015 | 86 | 25 | 5 | 50 | 1 | 5 | -0.019000 | -1.400000 |
| Croatia | 2000-2015 | 41 | 20 | 3 | 17 | 0 | 1 | -0.015000 | -2.200000 |
| Cyprus | 2000-2015 | 13 | 6 | 4 | 3 | 0 | 0 | -0.115000 | -7.100000 |
| Czech Republic | 2000-2015 | 19 | 7 | 4 | 7 | 1 | 0 | -0.026000 | -1.000000 |
| Denmark | 2000-2015 | 38 | 31 | 4 | 3 | 0 | 0 | -0.111000 | -2.600000 |
| Estonia | 2000-2015 | 51 | 8 | 1 | 13 | 8 | 21 | 0.020000 | 0.900000 |
| Finland | 2000-2015 | 93 | 15 | 4 | 65 | 2 | 7 | -0.001000 | -0.400000 |
| France | 2000-2015 | 245 | 54 | 19 | 153 | 5 | 14 | -0.014000 | -0.800000 |
| Germany | 2000-2015 | 136 | 81 | 5 | 48 | 1 | 1 | -0.041000 | -1.300000 |
| Iceland | 2000-2015 | 1 | 1 | 0 | 0 | 0 | 0 | -0.002000 | -5.100000 |
| Ireland | 2000-2015 | 53 | 14 | 6 | 26 | 0 | 7 | -0.017000 | -0.100000 |
| Italy | 2000-2015 | 67 | 42 | 3 | 16 | 0 | 6 | -0.020000 | -1.600000 |
| Latvia | 2000-2015 | 21 | 4 | 2 | 14 | 0 | 1 | 0.002000 | -0.700000 |
| Lithuania | 2000-2015 | 24 | 2 | 1 | 19 | 1 | 1 | 0.012000 | 0.100000 |
| Norway | 2000-2015 | 45 | 7 | 1 | 29 | 3 | 5 | 0.000000 | 0.200000 |
| Poland | 2000-2015 | 13 | 4 | 1 | 4 | 1 | 3 | 0.014000 | 0.600000 |
| Romania | 2000-2015 | 114 | 30 | 11 | 60 | 4 | 9 | -0.007000 | -1.000000 |
| Serbia | 2000-2015 | 31 | 15 | 4 | 11 | 0 | 1 | -0.028000 | -2.300000 |
| Slovakia | 2000-2015 | 18 | 6 | 2 | 9 | 0 | 1 | -0.019000 | -1.000000 |
| Slovenia | 2000-2015 | 10 | 1 | 2 | 7 | 0 | 0 | -0.007000 | -0.800000 |
| Spain | 2000-2015 | 112 | 25 | 8 | 60 | 6 | 13 | -0.014000 | -0.500000 |
| Sweden | 2000-2015 | 121 | 40 | 8 | 68 | 1 | 4 | -0.005000 | -1.300000 |
| Switzerland | 2000-2015 | 15 | 3 | 3 | 7 | 0 | 2 | -0.003000 | -0.100000 |
| North Macedonia | 2000-2015 | 19 | 1 | 3 | 14 | 1 | 0 | -0.017000 | -1.200000 |
| United Kingdom | 2000-2015 | 120 | 52 | 12 | 44 | 6 | 6 | -0.025000 | -1.000000 |