NEWE eGRID Subregion - NPCC New England Emission Factor (2023)

EPA eGRID2023 Rev2 · States: MA, ME, CT, VT, NH, RI · Clean

NEWE (NPCC New England) covers ZIP codes in MA (29%), ME (23%), CT (16%), VT (14%), NH (13%), RI (4%), by share of its ZIP codes. Its largest generation sources in 2023 were gas 56%, nuclear 23%, hydro 8%. This page gives the official EPA eGRID2023 emission factors for NEWE, used for GHG Protocol Scope 2 location-based reporting.

Emission Factors

543.178

lb CO₂e / MWh

0.2464

kg CO₂e / kWh

41.84%

Carbon-free

19.24%

Renewable

The NEWE subregion is 30% cleaner than the US average (770.9 lb CO₂e/MWh).

All Pollutants

Pollutant	lb / MWh	kg / kWh	Scope
CO₂e (total GHG)	543.178	0.2464	Scope 2
CO₂	539.275	0.2446	Scope 2
CH₄ (methane)	0.063	0.00002858	Scope 2
N₂O (nitrous oxide)	0.008	0.00000363	Scope 2
NO_x	0.291	0.00013200	Air quality
SO₂	0.116	0.00005262	Air quality
CO₂ non-baseload	885.095	0.4015	Avoided-emissions estimates (not Scope 2)

Generation Mix

Solar3.6%

Wind3.4%

Nuclear22.6%

Hydro8.0%

Natural Gas56.0%

Biomass4.3%

Other Fossil1.6%

kWh to CO₂ Calculator

Enter electricity consumption (kWh):

Using NEWE emission factor: 543.178 lb CO₂e/MWh = 0.2464 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: 543.178 lb/MWh or 0.2464 kg/kWh.

Get This Data via API

Query NEWE emission factors by ZIP code:

curl "https://emission-factors.com/api/lookup?zip=YOUR_ZIP"

Read the API docs - free, no key, no signup.

Frequently Asked Questions

What is the NEWE emission factor for Scope 2 reporting?

The NEWE eGRID2023 Scope 2 location-based emission factor is 543.178 lb CO₂e per MWh (0.2464 kg CO₂e per kWh). This is the value to use in GHG Protocol location-based Scope 2 calculations for facilities in the NPCC New England subregion.

Which states are in the NEWE subregion?

How do I convert kWh to kg CO₂e for NEWE?

Multiply kWh by 0.2464. Example: 50,000 kWh × 0.2464 = 12320 kg CO₂e (12.32 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