| Comunidad | Capacidad | Embalsada | Variacion | ||
| Andalucia | 11941 | 3568 | (29.88%) | -11 | (-0.09%) |
| Aragon | 4751 | 2845 | (59.88%) | -59 | (-1.24%) |
| Asturias | 456 | 348 | (76.32%) | 13 | (2.85%) |
| Cantabria | 575 | 244 | (42.43%) | 1 | (0.17%) |
| Castilla y Leon | 8292 | 5788 | (69.80%) | 77 | (0.93%) |
| Castilla-La Mancha | 5803 | 2344 | (40.39%) | 3 | (0.05%) |
| Cataluña | 1950 | 831 | (42.62%) | 0 | (0.00%) |
| Comunidad de Madrid | 1060 | 731 | (68.96%) | 0 | (0.00%) |
| Comunidad Valenciana | 1956 | 1127 | (57.62%) | -1 | (-0.05%) |
| Extremadura | 14456 | 7567 | (52.34%) | -9 | (-0.06%) |
| Galicia | 3220 | 2589 | (80.40%) | 36 | (1.12%) |
| La Rioja | 190 | 140 | (73.46%) | 0 | (0.00%) |
| Navarra | 1019 | 657 | (64.47%) | -8 | (-0.79%) |
| Pais Vasco | 252 | 193 | (76.59%) | 0 | (0.00%) |
| Region de Murcia | 148 | 40 | (27.03%) | -1 | (-0.68%) |
