US electricity emission factors: eGRID2024
Electricity emission factors for all 27 US eGRID subregions and the national average, in kg CO2e per kWh, from the GHG Emission Factors Hub. Each page shows every eGRID year back to 2021 and a worked example.
Not sure which subregion a site is in? Enter its ZIP code in EPA's Power Profiler. For sites in other countries, see electricity factors by country.
Reporting UK and US sites together? Carbon Recycling works out each line of your bills, mileage and travel and writes your reports.
| Subregion | Name | eGRID2024 (kg CO2e per kWh) | lb CO2 per MWh |
|---|---|---|---|
| AKGD | ASCC Alaska Grid | 0.418 | 914.7 |
| AKMS | ASCC Miscellaneous | 0.225 | 493.8 |
| AZNM | WECC Southwest | 0.303 | 665.8 |
| CAMX | WECC California | 0.184 | 403.6 |
| ERCT | ERCOT All | 0.319 | 700.7 |
| FRCC | FRCC All | 0.347 | 763.7 |
| HIMS | HICC Miscellaneous | 0.496 | 1,087.7 |
| HIOA | HICC Oahu | 0.675 | 1,478.1 |
| MROE | MRO East | 0.591 | 1,297.4 |
| MROW | MRO West | 0.394 | 862.6 |
| NEWE | NPCC New England | 0.247 | 540.3 |
| NWPP | WECC Northwest | 0.264 | 579.2 |
| NYCW | NPCC NYC/Westchester | 0.401 | 883.2 |
| NYLI | NPCC Long Island | 0.535 | 1,170.6 |
| NYUP | NPCC Upstate NY | 0.124 | 272 |
| PRMS | Puerto Rico Miscellaneous | 0.726 | 1,594.5 |
| RFCE | RFC East | 0.282 | 618.6 |
| RFCM | RFC Michigan | 0.448 | 982.5 |
| RFCW | RFC West | 0.406 | 889.6 |
| RMPA | WECC Rockies | 0.437 | 959 |
| SPNO | SPP North | 0.356 | 779 |
| SPSO | SPP South | 0.387 | 850.6 |
| SRMV | SERC Mississippi Valley | 0.332 | 730.8 |
| SRMW | SERC Midwest | 0.526 | 1,150.4 |
| SRSO | SERC South | 0.363 | 796.5 |
| SRTV | SERC Tennessee Valley | 0.429 | 940.4 |
| SRVC | SERC Virginia/Carolina | 0.291 | 637.4 |
| US average | National average | 0.341 | 747.9 |
Total output emission rate, CO2 + CH4 + N2O converted to CO2e with each edition's own GWPs. Location-based Scope 2. Sources: GHG Emission Factors Hub 2026 (Cornerstone, CC BY 4.0) andUS EPA GHG Emission Factors Hub (public domain).