| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 7066 | (58.91%) | -95 | (-0.79%) |
| Aragón | 4590 | 4139 | (90.17%) | 67 | (1.46%) |
| Asturias | 456 | 414 | (90.79%) | -6 | (-1.32%) |
| Cantabria | 575 | 447 | (77.74%) | -1 | (-0.17%) |
| Castilla y León | 8387 | 7683 | (91.60%) | -34 | (-0.41%) |
| Castilla-La Mancha | 5800 | 3639 | (62.74%) | -6 | (-0.10%) |
| Cataluña | 1950 | 1733 | (88.87%) | 25 | (1.28%) |
| Comunidad de Madrid | 1060 | 991 | (93.49%) | -10 | (-0.94%) |
| Comunidad Valenciana | 1956 | 1061 | (54.24%) | -14 | (-0.72%) |
| Extremadura | 14444 | 11578 | (80.15%) | -85 | (-0.59%) |
| Galicia | 3220 | 2708 | (84.10%) | -45 | (-1.40%) |
| La Rioja | 190 | 176 | (92.35%) | -1 | (-0.52%) |
| Navarra | 1019 | 930 | (91.27%) | 6 | (0.59%) |
| País Vasco | 252 | 221 | (87.70%) | -2 | (-0.79%) |
| Región de Murcia | 148 | 52 | (35.14%) | -2 | (-1.35%) |
