Massachusetts Electricity Emission Factor 2023

EPA eGRID2023 Rev2 · NEWE subregion

Power plants in Massachusetts emitted 830.1 lb CO2e per MWh generated in 2023 (0.3765 kg/kWh), 8% dirtier than the US average, according to EPA's eGRID2023 state rate. Their generation was 20% carbon-free and 20% renewable. For GHG Protocol Scope 2 location-based reporting, use the eGRID subregion factor of each facility's ZIP (below), not the state rate: power flows across state lines within a subregion.

830.1
lb CO2e / MWh (state)
0.3765
kg CO2e / kWh
20%
Carbon-free
20%
Renewable

eGRID Subregion: NEWE

All of Massachusetts's ZIP codes are in the NEWE (NPCC New England) eGRID subregion, whose Scope 2 factor is 543.178 lb CO2e/MWh (0.2464 kg/kWh).

Generation Mix

Solar10.1%
Wind0.9%
Hydro4.0%
Natural Gas75.1%
Biomass4.6%
Other Fossil4.8%

Generation by power plants in Massachusetts, 2023 (EPA eGRID2023 state resource mix).

kWh to CO2 Calculator - Massachusetts

Using the NEWE subregion factor (543.178 lb CO2e/MWh = 0.2464 kg/kWh). Source: EPA eGRID2023.

How to Use Massachusetts's Emission Factor for Scope 2 Reporting

For GHG Protocol Scope 2 location-based emissions reporting, multiply each facility's electricity consumption by the emission factor for its ZIP code's eGRID subregion. All Massachusetts ZIP codes use the NEWE factor: 543.178 lb CO2e/MWh.

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

Other States Served by the Same Subregions (state rates)

Connecticut
541 lb/MWh
Maine
317 lb/MWh
New Hampshire
276 lb/MWh
Rhode Island
840 lb/MWh
Vermont
52 lb/MWh
Massachusetts
830 lb/MWh

Frequently Asked Questions

What is Massachusetts's electricity emission factor?

For Scope 2 reporting, it depends on the ZIP: all are in NEWE, 543.178 lb CO2e/MWh. EPA's state rate for plants in Massachusetts is 830.1 lb CO2e/MWh, 8% dirtier than the US average.

How do I calculate Scope 2 emissions for a Massachusetts facility?

Multiply the facility's annual kWh by the kg/kWh factor of its ZIP code's eGRID subregion (0.2464 for NEWE) to get kg CO2e, and divide by 1,000 for metric tonnes. The emission factors API returns the factor for any ZIP.

How clean is Massachusetts's electricity grid?

Power plants in Massachusetts generated 20% carbon-free and 20% renewable electricity in 2023. At 830 lb CO2e/MWh, the state rate is 8% dirtier than the US average of 770.9 lb/MWh.

Get exact emission factors by ZIP code

33,700+ ZIP codes · All 27 eGRID subregions · CO2e, NOx, SO2, generation mix

Read the API docs · Scope 2 calculation guide