In 2021, eGrid and Green-e released new emission factors for the year 2019!
We will not be incorporating these new emission factors into SIMAP until we release the 2021 version of emission factors in late 2021 or early 2022. We only release new emission factor versions once a year with the updates that came out over the previous year. This is so that the emission factors are 'locked' for a given year and are not constantly changing throughout the year, which can create signficant confusion in reporting.
However, we know that many of you are eager to update to the latest electricity emission factors, and that is possible through customized emission factors! Below, please find the updated Green-e residual mix emission factors (for the scope 2 market-based approach) and the eGrid emission factors (for the scope 2 location-based approach. We also provide steps for customizing your emission factors below. As always, please contact us at simap@unh.edu with any questions.
Green-e residual mix emission factors for the scope 2 market-based approach
These emission factors have 2019 data, and were released in 2021. One exciting update is that the 2019 Green-e data set includes a new eGrid region for Puerto Rico. Note that Green-e only calculations residual mix emission factors for CO2; the other emission factors in the table below (CH4, N2O, NOx) come directly from eGrid and do not account for market transactions. However, in the absence of residual mix emission rates for CH4, N2O, and NOx, the standard eGrid factors are used. To incorporate these updated factors into your SIMAP account, please follow these steps:
- Go to the Data Mgmt tab to identify your eGrid region and confirm you are using the scope 2 market-based approach
- Record the emission factors for your eGrid region in the table below
- Go to the Data Entry tab > Utility emission factors page
- Navigate to the appropriate source from the drop-downs (e.g., electricity > CO2), and enter your custom emission factors
| eGRID subregion acronym | eGRID subregion name | Market-based 2019 kg CO2/kWh |
Market-based* 2019 kg CH4/kWh |
Market-based* 2019 kg N2O/kWh |
Market-based* 2019 kg NOx/kWh |
T&D loss ratio |
| AKGD | ASCC Alaska Grid | 0.510763 | 0.0000445 | 0.0000059 | 0.0028023 | 5.4% |
| AKMS | ASCC Miscellaneous | 0.249163 | 0.0000118 | 0.0000018 | 0.0036755 | 5.4% |
| AZNM | WECC Southwest | 0.43313 | 0.0000308 | 0.0000045 | 0.0002781 | 5.1% |
| CAMX | WECC California | 0.209315 | 0.0000150 | 0.0000018 | 0.0001960 | 5.1% |
| ERCT | ERCOT All | 0.42062 | 0.0000259 | 0.0000036 | 0.0002331 | 5.1% |
| FRCC | FRCC All | 0.393432 | 0.0000249 | 0.0000032 | 0.0001411 | 5.1% |
| HIMS | HICC Miscellaneous | 0.537779 | 0.0000649 | 0.0000100 | 0.0036514 | 5.5% |
| HIOA | HICC Oahu | 0.76863 | 0.0000839 | 0.0000127 | 0.0016992 | 5.5% |
| MROE | MRO East | 0.681567 | 0.0000667 | 0.0000100 | 0.0003760 | 5.1% |
| MROW | MRO West | 0.521449 | 0.0000540 | 0.0000077 | 0.0003706 | 5.1% |
| NEWE | NPCC New England | 0.222686 | 0.0000349 | 0.0000045 | 0.0001556 | 5.1% |
| NWPP | WECC Northwest | 0.332855 | 0.0000308 | 0.0000045 | 0.0002903 | 5.1% |
| NYCW | NPCC NYC/Westchester | 0.251199 | 0.0000095 | 0.0000009 | 0.0001021 | 5.1% |
| NYLI | NPCC Long Island | 0.548384 | 0.0000712 | 0.0000091 | 0.0004173 | 5.1% |
| NYUP | NPCC Upstate NY | 0.105397 | 0.0000077 | 0.0000009 | 0.0000499 | 5.1% |
| PRMS | Puerto Rico Miscellaneous | 0.704977 | 0.0000381 | 0.0000059 | 0.0015966 | 5.1% |
| RFCE | RFC East | 0.315355 | 0.0000240 | 0.0000032 | 0.0001451 | 5.1% |
| RFCM | RFC Michigan | 0.539752 | 0.0000517 | 0.0000073 | 0.0002998 | 5.1% |
| RFCW | RFC West | 0.484468 | 0.0000449 | 0.0000064 | 0.0003792 | 5.1% |
| RMPA | WECC Rockies | 0.578275 | 0.0000531 | 0.0000077 | 0.0003039 | 5.1% |
| SPNO | SPP North | 0.520519 | 0.0000508 | 0.0000073 | 0.0002549 | 5.1% |
| SPSO | SPP South | 0.537951 | 0.0000318 | 0.0000045 | 0.0003211 | 5.1% |
| SRMV | SERC Mississippi Valley | 0.366706 | 0.0000195 | 0.0000027 | 0.0002681 | 5.1% |
| SRMW | SERC Midwest | 0.722241 | 0.0000767 | 0.0000113 | 0.0004559 | 5.1% |
| SRSO | SERC South | 0.442633 | 0.0000322 | 0.0000045 | 0.0002014 | 5.1% |
| SRTV | SERC Tennessee Valley | 0.430872 | 0.0000395 | 0.0000059 | 0.0002159 | 5.1% |
| SRVC | SERC Virginia/Carolina | 0.307694 | 0.0000263 | 0.0000036 | 0.0001556 | 5.1% |
| US | US Average | 0.4010797 | 0.0000340 | 0.0000050 | 0.0002658 | 5.1% |
*Residual mix emission rates are not available for CH4, N2O, and NOx. Because of this, the eGrid factors are used in the market-based approach.
Source: https://www.green-e.org/2021-residual-mix (CO2)
See below for eGrid source for CH4, N2O, and NOx
eGrid emission factors for the scope 2 location-based approach
These emission factors have 2019 data, and were released in 2021. One exciting update is that the 2019 eGrid data set includes a new eGrid region for Puerto Rico. To incorporate these updated factors into your SIMAP account, please contact us at simap@unh.edu. In general, the location-based approach does not support customization, but we can help with this update.
| eGRID subregion acronym | eGRID subregion name | Location-based 2019 kg CO2/kWh |
Location-based 2019 kg CH4/kWh |
Location-based 2019 kg N2O/kWh |
Location-based 2019 kg NOx/kWh |
T&D loss ratio |
| AKGD | ASCC Alaska Grid | 0.5054829 | 0.0000445 | 0.0000059 | 0.0028023 | 5.4% |
| AKMS | ASCC Miscellaneous | 0.2491635 | 0.0000118 | 0.0000018 | 0.0036755 | 5.4% |
| AZNM | WECC Southwest | 0.4319652 | 0.0000308 | 0.0000045 | 0.0002781 | 5.1% |
| CAMX | WECC California | 0.2055720 | 0.0000150 | 0.0000018 | 0.0001960 | 5.1% |
| ERCT | ERCOT All | 0.3940082 | 0.0000259 | 0.0000036 | 0.0002331 | 5.1% |
| FRCC | FRCC All | 0.3905554 | 0.0000249 | 0.0000032 | 0.0001411 | 5.1% |
| HIMS | HICC Miscellaneous | 0.5377764 | 0.0000649 | 0.0000100 | 0.0036514 | 5.5% |
| HIOA | HICC Oahu | 0.7686302 | 0.0000839 | 0.0000127 | 0.0016992 | 5.5% |
| MROE | MRO East | 0.6815487 | 0.0000667 | 0.0000100 | 0.0003760 | 5.1% |
| MROW | MRO West | 0.4982041 | 0.0000540 | 0.0000077 | 0.0003706 | 5.1% |
| NEWE | NPCC New England | 0.2217557 | 0.0000349 | 0.0000045 | 0.0001556 | 5.1% |
| NWPP | WECC Northwest | 0.3244276 | 0.0000308 | 0.0000045 | 0.0002903 | 5.1% |
| NYCW | NPCC NYC/Westchester | 0.2511997 | 0.0000095 | 0.0000009 | 0.0001021 | 5.1% |
| NYLI | NPCC Long Island | 0.5483814 | 0.0000712 | 0.0000091 | 0.0004173 | 5.1% |
| NYUP | NPCC Upstate NY | 0.1053717 | 0.0000077 | 0.0000009 | 0.0000499 | 5.1% |
| PRMS | Puerto Rico Miscellaneous | 0.6973106 | 0.0000381 | 0.0000059 | 0.0015966 | 5.1% |
| RFCE | RFC East | 0.3152619 | 0.0000240 | 0.0000032 | 0.0001451 | 5.1% |
| RFCM | RFC Michigan | 0.5394728 | 0.0000517 | 0.0000073 | 0.0002998 | 5.1% |
| RFCW | RFC West | 0.4842907 | 0.0000449 | 0.0000064 | 0.0003792 | 5.1% |
| RMPA | WECC Rockies | 0.5636384 | 0.0000531 | 0.0000077 | 0.0003039 | 5.1% |
| SPNO | SPP North | 0.4853303 | 0.0000508 | 0.0000073 | 0.0002549 | 5.1% |
| SPSO | SPP South | 0.4544924 | 0.0000318 | 0.0000045 | 0.0003211 | 5.1% |
| SRMV | SERC Mississippi Valley | 0.3659376 | 0.0000195 | 0.0000027 | 0.0002681 | 5.1% |
| SRMW | SERC Midwest | 0.7186671 | 0.0000767 | 0.0000113 | 0.0004559 | 5.1% |
| SRSO | SERC South | 0.4396055 | 0.0000322 | 0.0000045 | 0.0002014 | 5.1% |
| SRTV | SERC Tennessee Valley | 0.4307741 | 0.0000395 | 0.0000059 | 0.0002159 | 5.1% |
| SRVC | SERC Virginia/Carolina | 0.3063637 | 0.0000263 | 0.0000036 | 0.0001556 | 5.1% |
| US | US Average | 0.4010797 | 0.0000340 | 0.0000050 | 0.0002658 | 5.1% |
Sources:
eGrid page https://www.epa.gov/egrid/download-data
Summary tables (PDF download): https://www.epa.gov/sites/production/files/2021-02/documents/egrid2019_summary_tables.pdf
eGrid 2019 data file (XLSX download): https://www.epa.gov/sites/production/files/2021-02/egrid2019_data.xlsx