| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 6255 | (52.15%) | -129 | (-1.08%) |
| Aragón | 4590 | 3396 | (73.99%) | -167 | (-3.64%) |
| Asturias | 456 | 338 | (74.12%) | -12 | (-2.63%) |
| Cantabria | 575 | 412 | (71.65%) | -7 | (-1.22%) |
| Castilla y León | 8387 | 6526 | (77.81%) | -165 | (-1.97%) |
| Castilla-La Mancha | 5800 | 3369 | (58.09%) | -42 | (-0.72%) |
| Cataluña | 1950 | 1559 | (79.95%) | -21 | (-1.08%) |
| Comunidad de Madrid | 1060 | 901 | (85.00%) | -15 | (-1.42%) |
| Comunidad Valenciana | 1956 | 922 | (47.14%) | -20 | (-1.02%) |
| Extremadura | 14444 | 10353 | (71.67%) | -114 | (-0.79%) |
| Galicia | 3220 | 2424 | (75.28%) | -27 | (-0.84%) |
| La Rioja | 190 | 146 | (76.61%) | -5 | (-2.62%) |
| Navarra | 1019 | 696 | (68.30%) | -38 | (-3.73%) |
| País Vasco | 252 | 199 | (78.97%) | -4 | (-1.59%) |
| Región de Murcia | 148 | 48 | (32.43%) | -1 | (-0.68%) |
