| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 7338 | (61.18%) | 13 | (0.11%) |
| Aragón | 4590 | 4082 | (88.93%) | -14 | (-0.31%) |
| Asturias | 456 | 404 | (88.60%) | 10 | (2.19%) |
| Cantabria | 575 | 439 | (76.35%) | 4 | (0.70%) |
| Castilla y León | 8387 | 7702 | (91.83%) | 60 | (0.72%) |
| Castilla-La Mancha | 5800 | 3621 | (62.43%) | 25 | (0.43%) |
| Cataluña | 1950 | 1658 | (85.03%) | 36 | (1.85%) |
| Comunidad de Madrid | 1060 | 998 | (94.15%) | -3 | (-0.28%) |
| Comunidad Valenciana | 1956 | 1105 | (56.49%) | 3 | (0.15%) |
| Extremadura | 14444 | 11767 | (81.46%) | -8 | (-0.06%) |
| Galicia | 3220 | 2699 | (83.82%) | -46 | (-1.43%) |
| La Rioja | 190 | 175 | (91.83%) | 1 | (0.52%) |
| Navarra | 1019 | 966 | (94.80%) | 4 | (0.39%) |
| País Vasco | 252 | 223 | (88.49%) | 2 | (0.79%) |
| Región de Murcia | 148 | 53 | (35.81%) | -1 | (-0.68%) |
