| Country | Period | Monitoring sites | Very negative | Marginally negative | No change | Marginally positive | Very positive | Sen slope (mg/l P) | Sen slope (%) |
|---|---|---|---|---|---|---|---|---|---|
| Europe | 1992-2018 | 742 | 366 | 52 | 267 | 9 | 48 | -0.002 | -1.3 |
| Austria | 1992-2018 | 27 | 20 | 1 | 6 | 0 | 0 | -0.002 | -2.7 |
| Belgium | 1992-2018 | 24 | 16 | 1 | 5 | 1 | 1 | -0.009 | -1.9 |
| Bulgaria | 1992-2018 | 31 | 9 | 1 | 21 | 0 | 0 | -0.005 | -1.8 |
| Czechia | 1992-2018 | 8 | 5 | 0 | 3 | 0 | 0 | -0.005 | -2.0 |
| Denmark | 1992-2018 | 39 | 20 | 2 | 13 | 0 | 4 | -0.001 | -0.7 |
| Estonia | 1992-2018 | 37 | 20 | 1 | 12 | 0 | 4 | -0.001 | -0.9 |
| Finland | 1992-2018 | 65 | 29 | 6 | 27 | 1 | 2 | 0.0 | -0.8 |
| France | 1992-2018 | 151 | 109 | 11 | 30 | 0 | 1 | -0.003 | -2.9 |
| Germany | 1992-2018 | 99 | 53 | 5 | 36 | 0 | 5 | -0.001 | -1.3 |
| Ireland | 1992-2018 | 4 | 2 | 1 | 1 | 0 | 0 | -0.001 | -1.9 |
| Latvia | 1992-2018 | 13 | 1 | 0 | 11 | 0 | 1 | 0.0 | 0.6 |
| Lithuania | 1992-2018 | 19 | 12 | 1 | 5 | 1 | 0 | -0.004 | -2.0 |
| Norway | 1992-2018 | 44 | 2 | 0 | 14 | 4 | 24 | 0.0 | 3.7 |
| Slovakia | 1992-2018 | 6 | 3 | 0 | 3 | 0 | 0 | -0.003 | -1.9 |
| Slovenia | 1992-2018 | 8 | 4 | 0 | 2 | 0 | 2 | -0.001 | -1.8 |
| Spain | 1992-2018 | 33 | 11 | 4 | 16 | 1 | 1 | -0.003 | -1.0 |
| Sweden | 1992-2018 | 111 | 36 | 12 | 59 | 1 | 3 | 0.0 | -1.0 |
| Switzerland | 1992-2018 | 6 | 6 | 0 | 0 | 0 | 0 | -0.001 | -3.1 |
| United Kingdom | 1992-2018 | 17 | 8 | 6 | 3 | 0 | 0 | -0.011 | -2.3 |
| Europe | 2000-2018 | 1083 | 342 | 82 | 577 | 23 | 59 | -0.002 | -0.8 |
| Albania | 2000-2018 | 3 | 0 | 0 | 2 | 1 | 0 | 0.005 | 9.6 |
| Austria | 2000-2018 | 41 | 12 | 2 | 27 | 0 | 0 | -0.001 | -2.1 |
| Belgium | 2000-2018 | 28 | 14 | 4 | 9 | 0 | 1 | -0.005 | -1.7 |
| Bulgaria | 2000-2018 | 53 | 30 | 1 | 22 | 0 | 0 | -0.009 | -3.5 |
| Croatia | 2000-2018 | 22 | 13 | 0 | 9 | 0 | 0 | -0.002 | -4.1 |
| Czechia | 2000-2018 | 8 | 4 | 0 | 3 | 0 | 1 | -0.005 | -1.9 |
| Denmark | 2000-2018 | 40 | 15 | 2 | 18 | 1 | 4 | 0.0 | -0.5 |
| Estonia | 2000-2018 | 39 | 15 | 2 | 15 | 1 | 6 | -0.001 | -0.3 |
| Finland | 2000-2018 | 75 | 30 | 5 | 37 | 1 | 2 | 0.0 | -1.0 |
| France | 2000-2018 | 213 | 72 | 15 | 114 | 2 | 10 | -0.001 | -2.0 |
| Germany | 2000-2018 | 102 | 30 | 5 | 59 | 4 | 4 | -0.001 | -0.9 |
| Iceland | 2000-2018 | 1 | 0 | 0 | 1 | 0 | 0 | 0.0 | 3.3 |
| Ireland | 2000-2018 | 33 | 23 | 3 | 6 | 0 | 1 | -0.001 | -3.6 |
| Latvia | 2000-2018 | 16 | 0 | 0 | 11 | 1 | 4 | 0.001 | 5.3 |
| Lithuania | 2000-2018 | 23 | 8 | 2 | 12 | 1 | 0 | -0.002 | -2.0 |
| North Macedonia | 2000-2018 | 18 | 0 | 0 | 10 | 2 | 6 | 0.023 | 8.6 |
| Norway | 2000-2018 | 44 | 0 | 0 | 30 | 2 | 12 | 0.0 | 5.6 |
| Romania | 2000-2018 | 95 | 27 | 8 | 53 | 4 | 3 | -0.003 | -2.0 |
| Serbia | 2000-2018 | 34 | 10 | 2 | 18 | 1 | 3 | -0.001 | 0.1 |
| Slovakia | 2000-2018 | 6 | 3 | 1 | 2 | 0 | 0 | -0.005 | -2.7 |
| Slovenia | 2000-2018 | 10 | 4 | 0 | 6 | 0 | 0 | -0.001 | -1.5 |
| Spain | 2000-2018 | 48 | 1 | 1 | 43 | 1 | 2 | 0.002 | 7.7 |
| Sweden | 2000-2018 | 113 | 24 | 26 | 61 | 1 | 1 | 0.0 | -2.1 |
| Switzerland | 2000-2018 | 16 | 2 | 2 | 11 | 0 | 1 | 0.0 | -0.9 |
| United Kingdom | 2000-2018 | 20 | 5 | 1 | 8 | 2 | 4 | -0.01 | 2.6 |