| Plant | Fuel | Country | MW | t CO₂/yr |
|---|---|---|---|---|
| CN ALMARAZ 1 | Nuclear | Spain | 2,017 | — |
| ARCOS DE LA FRONTERA GRUPO 1 | Gas | Spain | 1,585 | — |
| ALDEADAVILA II 2 | Hydro | Spain | 1,226 | — |
| TRILLO | Nuclear | Spain | 1,003 | — |
| JOSE M ORIOL GRUPO 4 | Hydro | Spain | 953 | — |
| CT SANTURCE 2 | Oil | Spain | 897 | — |
| La Muela II Grupo 4 | Hydro | Spain | 878 | — |
| VILLARINO 4 | Hydro | Spain | 851 | — |
| CTCC CASTELLON GRUPO 4 | Gas | Spain | 839 | — |
| CTCC ESCOMBRERAS | Gas | Spain | 816 | — |
| CASTELLON | Gas | Spain | 782 | — |
| LA MUELA CORTES 1 | Hydro | Spain | 634 | — |
| CT ESCOMBRERAS 5 | Oil | Spain | 537 | — |
| SAUCELLE II 1 | Hydro | Spain | 516 | — |
| CEDILLO 3 | Hydro | Spain | 495 | — |
| CT GUARDO 2 | Coal | Spain | 486 | — |
| San Esteban II Grupo 1 | Hydro | Spain | 438 | — |
| CT LADA 4 | Coal | Spain | 348 | — |
| RICOBAYO II 1 | Hydro | Spain | 327 | — |
| PUENTE BIBEY 4 | Hydro | Spain | 312 | — |
| CONSO 2 | Hydro | Spain | 268 | — |
| VALDECANAS 3 | Hydro | Spain | 247 | — |
| VILLALCAMPO II | Hydro | Spain | 216 | — |
| SOUTELO 2 | Hydro | Spain | 214 | — |
| AZUTAN 2 | Hydro | Spain | 198 | — |
| CASTRO II | Hydro | Spain | 195 | — |
| TORREJON 1 | Hydro | Spain | 130 | — |
| COFRENTES 1 | Hydro | Spain | 120 | — |
| GABRIEL Y GALAN | Hydro | Spain | 110 | — |
| BARAZAR 1 | Hydro | Spain | 83 | — |
| C.H. MILLARES II GRUPO 1 | Hydro | Spain | 70 | — |
| VALPARAISO 2 | Hydro | Spain | 65 | — |
| SANTIAGO-JARES 2 | Hydro | Spain | 53 | — |
| GUIJO DE GRANADILLA 2 | Hydro | Spain | 52 | — |
| MONTEFURADO 3 | Hydro | Spain | 44 | — |
| SOBRADELO 2 | Hydro | Spain | 44 | — |
| SAN PEDRO 2 | Hydro | Spain | 34 | — |
| CERNADILLA | Hydro | Spain | 33 | — |
| SOBRON 1 | Hydro | Spain | 28 | — |
| PONTENOVO 1 | Hydro | Spain | 26 | — |
| Central de San Pedro II Grupo 1 | Hydro | Spain | 23 | — |
| CONTRERAS II 1 | Hydro | Spain | 14 | — |
Ownership & capacity: WRI Global Power Plant Database (CC BY 4.0). Measured CO₂ where reported to EPA/EU ETS/Climate TRACE.
