| Comunidad | Capacidad | Embalsada | Variación | ||
| Andalucía | 11994 | 4408 | (36.75%) | -108 | (-0.90%) |
| Aragón | 4590 | 3095 | (67.43%) | -113 | (-2.46%) |
| Asturias | 456 | 416 | (91.23%) | -4 | (-0.88%) |
| Cantabria | 575 | 267 | (46.43%) | -8 | (-1.39%) |
| Castilla y León | 8385 | 6832 | (81.47%) | -208 | (-2.48%) |
| Castilla-La Mancha | 5800 | 2836 | (48.90%) | -47 | (-0.81%) |
| Cataluña | 1950 | 1206 | (61.85%) | -23 | (-1.18%) |
| Comunidad de Madrid | 1060 | 833 | (78.58%) | -14 | (-1.32%) |
| Comunidad Valenciana | 1956 | 719 | (36.76%) | -27 | (-1.38%) |
| Extremadura | 14444 | 8636 | (59.79%) | -260 | (-1.80%) |
| Galicia | 3220 | 2597 | (80.65%) | -25 | (-0.78%) |
| La Rioja | 190 | 113 | (59.30%) | -7 | (-3.67%) |
| Navarra | 1019 | 760 | (74.58%) | -46 | (-4.51%) |
| País Vasco | 252 | 209 | (82.94%) | -2 | (-0.79%) |
| Región de Murcia | 148 | 33 | (22.30%) | 0 | (0.00%) |
