| Comunidad | Capacidad | Embalsada | Variacion | ||
| Andalucia | 12035 | 7012 | (58.26%) | 26 | (0.22%) |
| Aragon | 4489 | 3209 | (71.49%) | 45 | (1.00%) |
| Asturias | 484 | 399 | (82.44%) | 10 | (2.07%) |
| Cantabria | 575 | 530 | (92.17%) | 5 | (0.87%) |
| Castilla y Leon | 8292 | 5222 | (62.97%) | 116 | (1.40%) |
| Castilla-La Mancha | 5753 | 2087 | (36.28%) | 17 | (0.30%) |
| Cataluña | 1950 | 1410 | (72.31%) | 1 | (0.05%) |
| Comunidad de Madrid | 1060 | 769 | (72.55%) | 5 | (0.47%) |
| Comunidad Valenciana | 2447 | 922 | (37.68%) | 60 | (2.45%) |
| Extremadura | 14219 | 7884 | (55.45%) | 34 | (0.24%) |
| Galicia | 3220 | 2281 | (70.84%) | 49 | (1.52%) |
| La Rioja | 136 | 109 | (80.15%) | 1 | (0.74%) |
| Navarra | 1014 | 706 | (69.63%) | 18 | (1.78%) |
| Pais Vasco | 252 | 204 | (80.95%) | -1 | (-0.40%) |
| Region de Murcia | 148 | 35 | (23.65%) | 4 | (2.70%) |
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