| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 5230 | (43.61%) | 36 | (0.30%) |
| Aragón | 4590 | 3454 | (75.25%) | -62 | (-1.35%) |
| Asturias | 456 | 412 | (90.35%) | 0 | (0.00%) |
| Cantabria | 575 | 260 | (45.22%) | 2 | (0.35%) |
| Castilla y León | 8385 | 7723 | (92.10%) | 22 | (0.26%) |
| Castilla-La Mancha | 5800 | 3153 | (54.36%) | 20 | (0.34%) |
| Cataluña | 1950 | 983 | (50.41%) | -4 | (-0.21%) |
| Comunidad de Madrid | 1060 | 950 | (89.62%) | 2 | (0.19%) |
| Comunidad Valenciana | 1956 | 848 | (43.35%) | 2 | (0.10%) |
| Extremadura | 14444 | 10184 | (70.50%) | 15 | (0.10%) |
| Galicia | 3220 | 2794 | (86.77%) | -12 | (-0.37%) |
| La Rioja | 190 | 142 | (74.51%) | 1 | (0.52%) |
| Navarra | 1019 | 958 | (94.01%) | -4 | (-0.39%) |
| País Vasco | 252 | 212 | (84.13%) | -1 | (-0.40%) |
| Región de Murcia | 148 | 39 | (26.35%) | 0 | (0.00%) |
