| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 5878 | (49.01%) | -119 | (-0.99%) |
| Aragón | 4590 | 2886 | (62.88%) | -162 | (-3.53%) |
| Asturias | 456 | 316 | (69.30%) | -9 | (-1.97%) |
| Cantabria | 575 | 392 | (68.17%) | -6 | (-1.04%) |
| Castilla y León | 8387 | 5911 | (70.47%) | -247 | (-2.94%) |
| Castilla-La Mancha | 5800 | 3216 | (55.45%) | -57 | (-0.98%) |
| Cataluña | 1950 | 1449 | (74.31%) | -41 | (-2.10%) |
| Comunidad de Madrid | 1060 | 860 | (81.13%) | -14 | (-1.32%) |
| Comunidad Valenciana | 1956 | 847 | (43.30%) | -26 | (-1.33%) |
| Extremadura | 14444 | 9804 | (67.87%) | -242 | (-1.68%) |
| Galicia | 3220 | 2267 | (70.40%) | -68 | (-2.11%) |
| La Rioja | 190 | 115 | (60.35%) | -11 | (-5.77%) |
| Navarra | 1019 | 558 | (54.76%) | -48 | (-4.71%) |
| País Vasco | 252 | 190 | (75.40%) | -4 | (-1.59%) |
| Región de Murcia | 148 | 45 | (30.41%) | -1 | (-0.68%) |
