NYCW eGRID Subregion - NPCC NYC/Westchester Emission Factor (2023)

EPA eGRID2023 Rev2 · States: NY · Dirty

NYCW (NPCC NYC/Westchester) covers ZIP codes in NY (100%), by share of its ZIP codes. Its largest generation sources in 2023 were gas 98%, other fossil 1%, biomass 1%. This page gives the official EPA eGRID2023 emission factors for NYCW, used for GHG Protocol Scope 2 location-based reporting.

Emission Factors

865.744

lb CO₂e / MWh

0.3927

kg CO₂e / kWh

0.59%

Carbon-free

0.59%

Renewable

The NYCW subregion is 12% dirtier than the US average (770.9 lb CO₂e/MWh).

All Pollutants

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
NO_x	0.232	0.00010523	Air quality
SO₂	0.024	0.00001089	Air quality
CO₂ non-baseload	976.891	0.4431	Avoided-emissions estimates (not Scope 2)

Generation Mix

Natural Gas98.2%

Biomass0.5%

Other Fossil0.7%

kWh to CO₂ Calculator

Enter electricity consumption (kWh):

Using NYCW emission factor: 865.744 lb CO₂e/MWh = 0.3927 kg/kWh. Source: EPA eGRID2023.

Data Source & Methodology

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.

Get This Data via API

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.

Subregions Serving the Same States

NYLI - NPCC Long Island NYUP - NPCC Upstate NY

Frequently Asked Questions

What is the NYCW emission factor for Scope 2 reporting?

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.

Which states are in the NYCW subregion?

NYCW (NPCC NYC/Westchester) covers ZIP codes in NY (100%), by share of its ZIP codes. Its largest generation sources in 2023 were gas 98%, other fossil 1%, biomass 1%.

How do I convert kWh to kg CO₂e for NYCW?

Multiply kWh by 0.3927. Example: 50,000 kWh × 0.3927 = 19635 kg CO₂e (19.64 tonnes).

Query any US ZIP code via API

33,700+ ZIP codes · All 27 eGRID subregions · EPA eGRID2023 + eGRID2024 (Cornerstone)

Read the API docs · Scope 2 guide