| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 7325 | (61.07%) | 29 | (0.24%) |
| Aragón | 4590 | 4096 | (89.24%) | 22 | (0.48%) |
| Asturias | 456 | 394 | (86.40%) | -3 | (-0.66%) |
| Cantabria | 575 | 435 | (75.65%) | 5 | (0.87%) |
| Castilla y León | 8387 | 7642 | (91.11%) | 88 | (1.05%) |
| Castilla-La Mancha | 5800 | 3596 | (62.00%) | 44 | (0.76%) |
| Cataluña | 1950 | 1622 | (83.18%) | 23 | (1.18%) |
| Comunidad de Madrid | 1060 | 1001 | (94.43%) | 23 | (2.17%) |
| Comunidad Valenciana | 1956 | 1102 | (56.34%) | 0 | (0.00%) |
| Extremadura | 14444 | 11775 | (81.52%) | 62 | (0.43%) |
| Galicia | 3220 | 2745 | (85.25%) | 17 | (0.53%) |
| La Rioja | 190 | 174 | (91.31%) | 1 | (0.52%) |
| Navarra | 1019 | 962 | (94.41%) | 2 | (0.20%) |
| País Vasco | 252 | 221 | (87.70%) | -3 | (-1.19%) |
| Región de Murcia | 148 | 54 | (36.49%) | 0 | (0.00%) |
