| Comunidad | Capacidad | Embalsada | Variacion | ||
| Andalucia | 11994 | 5194 | (43.30%) | 86 | (0.72%) |
| Aragon | 4590 | 3516 | (76.60%) | -18 | (-0.39%) |
| Asturias | 456 | 412 | (90.35%) | 10 | (2.19%) |
| Cantabria | 575 | 258 | (44.87%) | 4 | (0.70%) |
| Castilla y Leon | 8385 | 7701 | (91.84%) | 112 | (1.34%) |
| Castilla-La Mancha | 5800 | 3133 | (54.02%) | 54 | (0.93%) |
| Cataluña | 1950 | 987 | (50.62%) | 51 | (2.62%) |
| Comunidad de Madrid | 1060 | 948 | (89.43%) | 2 | (0.19%) |
| Comunidad Valenciana | 1956 | 846 | (43.25%) | 1 | (0.05%) |
| Extremadura | 14444 | 10169 | (70.40%) | 38 | (0.26%) |
| Galicia | 3220 | 2806 | (87.14%) | -16 | (-0.50%) |
| La Rioja | 190 | 141 | (73.99%) | 2 | (1.05%) |
| Navarra | 1019 | 962 | (94.41%) | -4 | (-0.39%) |
| Pais Vasco | 252 | 213 | (84.52%) | 0 | (0.00%) |
| Region de Murcia | 148 | 39 | (26.35%) | -1 | (-0.68%) |
