| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 6769 | (56.44%) | -115 | (-0.96%) |
| Aragón | 4590 | 3923 | (85.47%) | -129 | (-2.81%) |
| Asturias | 456 | 386 | (84.65%) | -7 | (-1.54%) |
| Cantabria | 575 | 440 | (76.52%) | -4 | (-0.70%) |
| Castilla y León | 8387 | 7273 | (86.71%) | -168 | (-2.00%) |
| Castilla-La Mancha | 5800 | 3554 | (61.28%) | -39 | (-0.67%) |
| Cataluña | 1950 | 1670 | (85.64%) | -21 | (-1.08%) |
| Comunidad de Madrid | 1060 | 956 | (90.19%) | -14 | (-1.32%) |
| Comunidad Valenciana | 1956 | 1010 | (51.64%) | -19 | (-0.97%) |
| Extremadura | 14444 | 11050 | (76.50%) | -193 | (-1.34%) |
| Galicia | 3220 | 2562 | (79.57%) | -54 | (-1.68%) |
| La Rioja | 190 | 168 | (88.16%) | -5 | (-2.62%) |
| Navarra | 1019 | 844 | (82.83%) | -36 | (-3.53%) |
| País Vasco | 252 | 212 | (84.13%) | -4 | (-1.59%) |
| Región de Murcia | 148 | 52 | (35.14%) | -1 | (-0.68%) |
