| Comunidad | Capacidad | Embalsada | Variacion | ||
| Andalucia | 12035 | 7997 | (66.45%) | 324 | (2.69%) |
| Aragon | 4489 | 3490 | (77.75%) | 265 | (5.90%) |
| Asturias | 484 | 419 | (86.57%) | -27 | (-5.58%) |
| Cantabria | 575 | 444 | (77.22%) | 12 | (2.09%) |
| Castilla y Leon | 8292 | 6268 | (75.59%) | 265 | (3.20%) |
| Castilla-La Mancha | 5753 | 2103 | (36.55%) | 165 | (2.87%) |
| Cataluña | 1950 | 1538 | (78.87%) | 173 | (8.87%) |
| Comunidad de Madrid | 1060 | 848 | (80.00%) | 44 | (4.15%) |
| Comunidad Valenciana | 2447 | 730 | (29.83%) | 19 | (0.78%) |
| Extremadura | 14219 | 10562 | (74.28%) | 594 | (4.18%) |
| Galicia | 3220 | 2768 | (85.96%) | 11 | (0.34%) |
| La Rioja | 136 | 125 | (91.91%) | 0 | (0.00%) |
| Navarra | 1014 | 915 | (90.24%) | -23 | (-2.27%) |
| Pais Vasco | 252 | 227 | (90.08%) | 11 | (4.37%) |
| Region de Murcia | 148 | 27 | (18.24%) | 0 | (0.00%) |
