| 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 | 400 | 108 (27%) | 18 (5%) | 164 (41%) | 10 (3%) | 100 (25%) | 0.000000 | 0.200000 |
| Austria | 1992-2012 | 13 | 6 (46%) | 0 (0%) | 7 (54%) | 0 (0%) | 0 (0%) | -0.200000 | -0.900000 |
| Belgium | 1992-2012 | 24 | 2 (8%) | 0 (0%) | 9 (38%) | 2 (8%) | 11 (46%) | 0.100000 | 0.700000 |
| Bulgaria | 1992-2012 | 24 | 5 (21%) | 3 (13%) | 11 (46%) | 0 (0%) | 5 (21%) | 0.300000 | 0.000000 |
| Denmark | 1992-2012 | 97 | 27 (28%) | 4 (4%) | 31 (32%) | 4 (4%) | 31 (32%) | 0.100000 | 0.600000 |
| Estonia | 1992-2012 | 20 | 1 (5%) | 1 (5%) | 12 (60%) | 1 (5%) | 5 (25%) | 0.100000 | 1.600000 |
| Finland | 1992-2012 | 33 | 10 (30%) | 2 (6%) | 14 (42%) | 0 (0%) | 7 (21%) | 0.000000 | -0.900000 |
| Germany | 1992-2012 | 98 | 25 (26%) | 3 (3%) | 42 (43%) | 3 (3%) | 25 (26%) | 0.000000 | 0.700000 |
| Ireland | 1992-2012 | 62 | 18 (29%) | 5 (8%) | 29 (47%) | 0 (0%) | 10 (16%) | -0.200000 | -0.700000 |
| Liechtenstein | 1992-2012 | 1 | 1 (100%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0.000000 | -0.800000 |
| Lithuania | 1992-2012 | 2 | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 2 (100%) | 0.100000 | 6.500000 |
| Netherlands | 1992-2012 | 9 | 5 (56%) | 0 (0%) | 3 (33%) | 0 (0%) | 1 (11%) | -0.300000 | -2.000000 |
| Norway | 1992-2012 | 1 | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 1 (100%) | 0.300000 | 13.600000 |
| Portugal | 1992-2012 | 2 | 2 (100%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | -0.300000 | -2.200000 |
| Slovakia | 1992-2012 | 10 | 5 (50%) | 0 (0%) | 4 (40%) | 0 (0%) | 1 (10%) | -0.300000 | -1.600000 |
| Slovenia | 1992-2012 | 4 | 1 (25%) | 0 (0%) | 2 (50%) | 0 (0%) | 1 (25%) | -0.200000 | 0.200000 |
| Europe | 2000-2012 | 1242 | 262 (21%) | 54 (4%) | 622 (50%) | 70 (6%) | 234 (19%) | 0.000000 | 0.300000 |
| Austria | 2000-2012 | 14 | 6 (43%) | 1 (7%) | 5 (36%) | 2 (14%) | 0 (0%) | -0.100000 | -0.700000 |
| Belgium | 2000-2012 | 38 | 4 (11%) | 0 (0%) | 22 (58%) | 6 (16%) | 6 (16%) | 0.300000 | 1.000000 |
| Bulgaria | 2000-2012 | 42 | 6 (14%) | 3 (7%) | 20 (48%) | 2 (5%) | 11 (26%) | 0.000000 | 0.400000 |
| Cyprus | 2000-2012 | 4 | 0 (0%) | 0 (0%) | 0 (0%) | 3 (75%) | 1 (25%) | 2.500000 | 8.600000 |
| Czech Republic | 2000-2012 | 63 | 17 (27%) | 3 (5%) | 24 (38%) | 4 (6%) | 15 (24%) | -0.100000 | 1.200000 |
| Denmark | 2000-2012 | 108 | 13 (12%) | 3 (3%) | 63 (58%) | 5 (5%) | 24 (22%) | 0.100000 | 2.200000 |
| Estonia | 2000-2012 | 27 | 0 (0%) | 0 (0%) | 20 (74%) | 0 (0%) | 7 (26%) | 0.200000 | 2.500000 |
| Finland | 2000-2012 | 34 | 13 (38%) | 0 (0%) | 17 (50%) | 0 (0%) | 4 (12%) | 0.000000 | -2.200000 |
| France | 2000-2012 | 220 | 49 (22%) | 6 (3%) | 99 (45%) | 14 (6%) | 52 (24%) | 0.000000 | 0.600000 |
| Germany | 2000-2012 | 217 | 43 (20%) | 5 (2%) | 113 (52%) | 17 (8%) | 39 (18%) | 0.000000 | 0.600000 |
| Ireland | 2000-2012 | 89 | 28 (31%) | 12 (13%) | 44 (49%) | 1 (1%) | 4 (4%) | -0.400000 | -2.000000 |
| Italy | 2000-2012 | 7 | 1 (14%) | 1 (14%) | 5 (71%) | 0 (0%) | 0 (0%) | 0.400000 | -0.500000 |
| Liechtenstein | 2000-2012 | 1 | 1 (100%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | -0.100000 | -1.200000 |
| Lithuania | 2000-2012 | 3 | 0 (0%) | 0 (0%) | 3 (100%) | 0 (0%) | 0 (0%) | 0.100000 | 4.600000 |
| Luxembourg | 2000-2012 | 3 | 0 (0%) | 0 (0%) | 1 (33%) | 0 (0%) | 2 (67%) | 0.700000 | 2.200000 |
| Malta | 2000-2012 | 2 | 0 (0%) | 0 (0%) | 2 (100%) | 0 (0%) | 0 (0%) | 0.300000 | 0.700000 |
| Netherlands | 2000-2012 | 9 | 3 (33%) | 1 (11%) | 4 (44%) | 0 (0%) | 1 (11%) | 0.000000 | -2.100000 |
| Norway | 2000-2012 | 1 | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 1 (100%) | 0.400000 | 11.400000 |
| Portugal | 2000-2012 | 10 | 1 (10%) | 2 (20%) | 6 (60%) | 1 (10%) | 0 (0%) | -0.600000 | -0.900000 |
| Serbia | 2000-2012 | 21 | 3 (14%) | 1 (5%) | 13 (62%) | 1 (5%) | 3 (14%) | -0.200000 | -0.900000 |
| Slovakia | 2000-2012 | 10 | 2 (20%) | 1 (10%) | 6 (60%) | 1 (10%) | 0 (0%) | 0.100000 | -1.000000 |
| Slovenia | 2000-2012 | 4 | 2 (50%) | 0 (0%) | 1 (25%) | 0 (0%) | 1 (25%) | -0.500000 | -1.000000 |
| Spain | 2000-2012 | 158 | 31 (20%) | 5 (3%) | 77 (49%) | 5 (3%) | 40 (25%) | 0.000000 | -0.100000 |
| Switzerland | 2000-2012 | 30 | 9 (30%) | 3 (10%) | 18 (60%) | 0 (0%) | 0 (0%) | -0.100000 | -1.000000 |
| United Kingdom | 2000-2012 | 127 | 30 (24%) | 7 (6%) | 59 (46%) | 8 (6%) | 23 (18%) | 0.000000 | -0.200000 |