| Comunidad | Capacidad | Embalsada | Variacion | ||
| Andalucia | 12030 | 4625 | (38.45%) | 1 | (0.01%) |
| Aragon | 4489 | 2654 | (59.12%) | 339 | (7.55%) |
| Asturias | 484 | 388 | (80.17%) | 77 | (15.91%) |
| Cantabria | 575 | 316 | (54.96%) | 29 | (5.04%) |
| Castilla y Leon | 8292 | 3711 | (44.75%) | 219 | (2.64%) |
| Castilla-La Mancha | 5797 | 1520 | (26.22%) | 2 | (0.03%) |
| Cataluña | 1950 | 1214 | (62.26%) | 8 | (0.41%) |
| Comunidad de Madrid | 1060 | 490 | (46.23%) | 5 | (0.47%) |
| Comunidad Valenciana | 1956 | 709 | (36.25%) | -1 | (-0.05%) |
| Extremadura | 14219 | 5448 | (38.31%) | 16 | (0.11%) |
| Galicia | 3220 | 2365 | (73.45%) | 226 | (7.02%) |
| La Rioja | 136 | 47 | (34.56%) | 3 | (2.21%) |
| Navarra | 1014 | 509 | (50.20%) | 64 | (6.31%) |
| Pais Vasco | 252 | 198 | (78.57%) | 21 | (8.33%) |
| Region de Murcia | 148 | 57 | (38.51%) | -1 | (-0.68%) |
