New York City and Westchester - served by NYISO with gas, nuclear, and hydro. This page provides the official EPA eGRID2023 electricity emission factors for the NYCW subregion, used for GHG Protocol Scope 2 location-based emissions reporting.
The NYCW subregion is 12% dirtier than the US average (770.9 lb CO2e/MWh).
| Pollutant | lb / MWh | kg / kWh | Scope |
|---|---|---|---|
| CO2e (total GHG) | 865.744 | 0.3927 | Scope 2 |
| CO2 | 864.469 | 0.3921 | Scope 2 |
| CH4 (methane) | 0.022 | 0.00000998 | Scope 2 |
| N2O (nitrous oxide) | 0.002 | 0.00000091 | Scope 2 |
| NOx | 0.232 | 0.00010523 | Air quality |
| SO2 | 0.024 | 0.00001089 | Air quality |
| CO2 non-baseload | 976.891 | 0.4431 | Scope 2 (marginal) |
Using NYCW emission factor: 865.744 lb CO2e/MWh = 0.3927 kg/kWh. Source: EPA eGRID2023.
These emission factors are from EPA eGRID2023 Rev2 (released June 2025), the official US government source for grid electricity emission rates. eGRID uses annual net generation and emissions data from all US power plants to calculate subregion-level output emission rates.
For GHG Protocol Scope 2 reporting, use the CO2e total output emission rate: 865.744 lb/MWh or 0.3927 kg/kWh.
Primary utility: Consolidated Edison
Query NYCW emission factors by ZIP code:
curl "https://emission-factors.com/api/lookup?zip=YOUR_ZIP"
Read the API docs - free, no key, no signup.
NYLI - NPCC Long Island NYUP - NPCC Upstate NY
The NYCW eGRID2023 Scope 2 location-based emission factor is 865.744 lb CO2e per MWh (0.3927 kg CO2e per kWh). This is the value to use in GHG Protocol location-based Scope 2 calculations for facilities in the NPCC NYC/Westchester subregion.
The NYCW (NPCC NYC/Westchester) eGRID subregion covers: NY. New York City and Westchester - served by NYISO with gas, nuclear, and hydro.
Multiply kWh by 0.3927. Example: 50,000 kWh × 0.3927 = 19635 kg CO2e (19.64 tonnes).
Query any US ZIP code via API
33,616 ZIP codes · All 27 eGRID subregions · EPA eGRID2023 + 2024 preliminary
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