| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 7296 | (60.83%) | 29 | (0.24%) |
| Aragón | 4590 | 4074 | (88.76%) | 119 | (2.59%) |
| Asturias | 456 | 397 | (87.06%) | 19 | (4.17%) |
| Cantabria | 575 | 430 | (74.78%) | 4 | (0.70%) |
| Castilla y León | 8387 | 7554 | (90.06%) | 107 | (1.28%) |
| Castilla-La Mancha | 5800 | 3553 | (61.26%) | 54 | (0.93%) |
| Cataluña | 1950 | 1599 | (82.00%) | 12 | (0.62%) |
| Comunidad de Madrid | 1060 | 978 | (92.26%) | 13 | (1.23%) |
| Comunidad Valenciana | 1956 | 1102 | (56.34%) | 7 | (0.36%) |
| Extremadura | 14444 | 11713 | (81.09%) | 30 | (0.21%) |
| Galicia | 3220 | 2728 | (84.72%) | 69 | (2.14%) |
| La Rioja | 190 | 173 | (90.78%) | 4 | (2.10%) |
| Navarra | 1019 | 960 | (94.21%) | 16 | (1.57%) |
| País Vasco | 252 | 224 | (88.89%) | 5 | (1.98%) |
| Región de Murcia | 148 | 54 | (36.49%) | 0 | (0.00%) |
