| Country | Period | Ground-water bodies | Very negative | Marginally negative | No change | Marginally positive | Very positive | Sen slope (mg/l NO3) | Sen slope (%) |
|---|---|---|---|---|---|---|---|---|---|
| Europe | 1992-2012 | 1059 | 423 (40%) | 47 (4%) | 453 (43%) | 27 (3%) | 109 (10%) | 0.000000 | -0.800000 |
| Austria | 1992-2012 | 47 | 19 (40%) | 2 (4%) | 23 (49%) | 0 (0%) | 3 (6%) | 0.000000 | -0.800000 |
| Belgium | 1992-2012 | 27 | 11 (41%) | 1 (4%) | 14 (52%) | 0 (0%) | 1 (4%) | 0.000000 | -0.900000 |
| Bulgaria | 1992-2012 | 74 | 21 (28%) | 4 (5%) | 45 (61%) | 1 (1%) | 3 (4%) | 0.000000 | -2.100000 |
| Denmark | 1992-2012 | 38 | 36 (95%) | 0 (0%) | 2 (5%) | 0 (0%) | 0 (0%) | -0.200000 | -3.400000 |
| Estonia | 1992-2012 | 53 | 5 (9%) | 0 (0%) | 22 (42%) | 5 (9%) | 21 (40%) | 0.000000 | 1.000000 |
| Finland | 1992-2012 | 84 | 13 (15%) | 4 (5%) | 40 (48%) | 6 (7%) | 21 (25%) | 0.000000 | 0.300000 |
| France | 1992-2012 | 188 | 46 (24%) | 7 (4%) | 108 (57%) | 4 (2%) | 23 (12%) | -0.010000 | -0.300000 |
| Germany | 1992-2012 | 136 | 106 (78%) | 8 (6%) | 22 (16%) | 0 (0%) | 0 (0%) | -0.100000 | -1.700000 |
| Ireland | 1992-2012 | 3 | 2 (67%) | 0 (0%) | 1 (33%) | 0 (0%) | 0 (0%) | -0.010000 | -1.400000 |
| Latvia | 1992-2012 | 17 | 13 (76%) | 0 (0%) | 4 (24%) | 0 (0%) | 0 (0%) | -0.030000 | -3.200000 |
| Liechtenstein | 1992-2012 | 12 | 2 (17%) | 0 (0%) | 9 (75%) | 1 (8%) | 0 (0%) | -0.010000 | -0.500000 |
| Lithuania | 1992-2012 | 27 | 6 (22%) | 1 (4%) | 15 (56%) | 0 (0%) | 5 (19%) | 0.010000 | 0.000000 |
| Luxembourg | 1992-2012 | 3 | 0 (0%) | 0 (0%) | 3 (100%) | 0 (0%) | 0 (0%) | 0.020000 | 0.400000 |
| Norway | 1992-2012 | 10 | 4 (40%) | 2 (20%) | 4 (40%) | 0 (0%) | 0 (0%) | 0.000000 | -1.500000 |
| Poland | 1992-2012 | 48 | 15 (31%) | 2 (4%) | 21 (44%) | 1 (2%) | 9 (19%) | 0.000000 | -0.500000 |
| Slovakia | 1992-2012 | 15 | 7 (47%) | 2 (13%) | 6 (40%) | 0 (0%) | 0 (0%) | -0.020000 | -1.200000 |
| Slovenia | 1992-2012 | 13 | 3 (23%) | 1 (8%) | 6 (46%) | 2 (15%) | 1 (8%) | 0.000000 | 0.100000 |
| Sweden | 1992-2012 | 108 | 50 (46%) | 6 (6%) | 49 (45%) | 1 (1%) | 2 (2%) | -0.010000 | -1.200000 |
| Switzerland | 1992-2012 | 6 | 1 (17%) | 0 (0%) | 3 (50%) | 0 (0%) | 2 (33%) | 0.000000 | 0.100000 |
| United Kingdom | 1992-2012 | 150 | 63 (42%) | 7 (5%) | 56 (37%) | 6 (4%) | 18 (12%) | -0.030000 | -0.600000 |
| Europe | 2000-2012 | 1653 | 399 (24%) | 119 (7%) | 1005 (61%) | 46 (3%) | 84 (5%) | -0.020000 | -1.100000 |
| Austria | 2000-2012 | 49 | 3 (6%) | 1 (2%) | 39 (80%) | 3 (6%) | 3 (6%) | -0.010000 | -0.200000 |
| Belgium | 2000-2012 | 36 | 6 (17%) | 4 (11%) | 26 (72%) | 0 (0%) | 0 (0%) | -0.050000 | -1.300000 |
| Bosnia-Herzegovina | 2000-2012 | 27 | 7 (26%) | 2 (7%) | 13 (48%) | 0 (0%) | 5 (19%) | 0.000000 | -0.300000 |
| Bulgaria | 2000-2012 | 90 | 16 (18%) | 7 (8%) | 65 (72%) | 0 (0%) | 2 (2%) | -0.040000 | -2.400000 |
| Croatia | 2000-2012 | 37 | 17 (46%) | 3 (8%) | 17 (46%) | 0 (0%) | 0 (0%) | -0.020000 | -2.500000 |
| Cyprus | 2000-2012 | 9 | 4 (44%) | 0 (0%) | 5 (56%) | 0 (0%) | 0 (0%) | -0.060000 | -4.300000 |
| Denmark | 2000-2012 | 39 | 33 (85%) | 2 (5%) | 3 (8%) | 0 (0%) | 1 (3%) | -0.150000 | -3.400000 |
| Estonia | 2000-2012 | 53 | 3 (6%) | 0 (0%) | 31 (58%) | 8 (15%) | 11 (21%) | 0.020000 | 1.700000 |
| Finland | 2000-2012 | 101 | 9 (9%) | 6 (6%) | 79 (78%) | 3 (3%) | 4 (4%) | 0.000000 | -0.400000 |
| France | 2000-2012 | 246 | 38 (15%) | 17 (7%) | 172 (70%) | 9 (4%) | 10 (4%) | -0.020000 | -0.800000 |
| Germany | 2000-2012 | 139 | 53 (38%) | 19 (14%) | 65 (47%) | 0 (0%) | 2 (1%) | -0.040000 | -1.300000 |
| Iceland | 2000-2012 | 1 | 0 (0%) | 0 (0%) | 1 (100%) | 0 (0%) | 0 (0%) | 0.000000 | -4.600000 |
| Ireland | 2000-2012 | 53 | 6 (11%) | 2 (4%) | 38 (72%) | 2 (4%) | 5 (9%) | -0.010000 | -0.400000 |
| Italy | 2000-2012 | 152 | 75 (49%) | 7 (5%) | 63 (41%) | 1 (1%) | 6 (4%) | -0.030000 | -2.400000 |
| Latvia | 2000-2012 | 21 | 2 (10%) | 3 (14%) | 15 (71%) | 1 (5%) | 0 (0%) | -0.010000 | -2.000000 |
| Liechtenstein | 2000-2012 | 12 | 2 (17%) | 3 (25%) | 7 (58%) | 0 (0%) | 0 (0%) | -0.030000 | -1.900000 |
| Lithuania | 2000-2012 | 28 | 2 (7%) | 0 (0%) | 24 (86%) | 1 (4%) | 1 (4%) | 0.000000 | -0.700000 |
| Luxembourg | 2000-2012 | 3 | 0 (0%) | 0 (0%) | 2 (67%) | 0 (0%) | 1 (33%) | 0.060000 | 1.100000 |
| Former Yugoslav Republic of Macedonia | 2000-2012 | 19 | 0 (0%) | 0 (0%) | 16 (84%) | 1 (5%) | 2 (11%) | 0.000000 | 0.300000 |
| Netherlands | 2000-2012 | 2 | 2 (100%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | -0.040000 | -1.200000 |
| Norway | 2000-2012 | 10 | 2 (20%) | 0 (0%) | 8 (80%) | 0 (0%) | 0 (0%) | 0.000000 | -2.200000 |
| Poland | 2000-2012 | 60 | 10 (17%) | 5 (8%) | 29 (48%) | 5 (8%) | 11 (18%) | 0.000000 | -0.300000 |
| Romania | 2000-2012 | 118 | 24 (20%) | 9 (8%) | 71 (60%) | 7 (6%) | 7 (6%) | -0.010000 | -0.900000 |
| Serbia | 2000-2012 | 37 | 16 (43%) | 3 (8%) | 17 (46%) | 1 (3%) | 0 (0%) | -0.030000 | -2.800000 |
| Slovakia | 2000-2012 | 15 | 3 (20%) | 2 (13%) | 10 (67%) | 0 (0%) | 0 (0%) | -0.020000 | -0.900000 |
| Slovenia | 2000-2012 | 14 | 0 (0%) | 1 (7%) | 11 (79%) | 0 (0%) | 2 (14%) | 0.000000 | 0.100000 |
| Sweden | 2000-2012 | 110 | 24 (22%) | 11 (10%) | 73 (66%) | 0 (0%) | 2 (2%) | -0.010000 | -1.300000 |
| Switzerland | 2000-2012 | 16 | 1 (6%) | 1 (6%) | 13 (81%) | 0 (0%) | 1 (6%) | 0.000000 | 0.000000 |
| United Kingdom | 2000-2012 | 156 | 41 (26%) | 11 (7%) | 92 (59%) | 4 (3%) | 8 (5%) | -0.020000 | -0.500000 |