| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 5535 | (46.15%) | -101 | (-0.84%) |
| Aragón | 4590 | 2622 | (57.12%) | -75 | (-1.63%) |
| Asturias | 456 | 300 | (65.79%) | -6 | (-1.32%) |
| Cantabria | 575 | 372 | (64.70%) | -7 | (-1.22%) |
| Castilla y León | 8387 | 5418 | (64.60%) | -122 | (-1.45%) |
| Castilla-La Mancha | 5800 | 3084 | (53.17%) | -42 | (-0.72%) |
| Cataluña | 1950 | 1400 | (71.79%) | -6 | (-0.31%) |
| Comunidad de Madrid | 1060 | 819 | (77.26%) | -14 | (-1.32%) |
| Comunidad Valenciana | 1956 | 778 | (39.78%) | -19 | (-0.97%) |
| Extremadura | 14444 | 9382 | (64.95%) | -145 | (-1.00%) |
| Galicia | 3220 | 2155 | (66.93%) | -21 | (-0.65%) |
| La Rioja | 190 | 97 | (50.90%) | -5 | (-2.62%) |
| Navarra | 1019 | 452 | (44.36%) | -31 | (-3.04%) |
| País Vasco | 252 | 181 | (71.83%) | -4 | (-1.59%) |
| Región de Murcia | 148 | 41 | (27.70%) | -1 | (-0.68%) |
