| Comunidad | Capacidad | Embalsada | Variacion | ||
| Andalucia | 12030 | 3963 | (32.94%) | -47 | (-0.39%) |
| Aragon | 4707 | 3120 | (66.28%) | -45 | (-0.96%) |
| Asturias | 484 | 316 | (65.29%) | -1 | (-0.21%) |
| Cantabria | 575 | 284 | (49.39%) | 11 | (1.91%) |
| Castilla y Leon | 8292 | 4453 | (53.70%) | -159 | (-1.92%) |
| Castilla-La Mancha | 5797 | 1937 | (33.41%) | -12 | (-0.21%) |
| Cataluña | 1950 | 1473 | (75.54%) | 21 | (1.08%) |
| Comunidad de Madrid | 1060 | 655 | (61.79%) | -8 | (-0.75%) |
| Comunidad Valenciana | 1956 | 929 | (47.49%) | -6 | (-0.31%) |
| Extremadura | 14219 | 5602 | (39.40%) | -107 | (-0.75%) |
| Galicia | 3220 | 1816 | (56.40%) | -28 | (-0.87%) |
| La Rioja | 190 | 70 | (36.73%) | -1 | (-0.52%) |
| Navarra | 1019 | 452 | (44.36%) | 29 | (2.85%) |
| Pais Vasco | 252 | 172 | (68.25%) | 7 | (2.78%) |
| Region de Murcia | 148 | 44 | (29.73%) | 0 | (0.00%) |
