Power plants in Montana emitted 1063.9 lb CO₂e per MWh generated in 2023 (0.4826 kg/kWh), 38% dirtier than the US average, according to EPA's eGRID2023 state rate. Their generation was 51% carbon-free and 51% 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.

1063.9

lb CO₂e / MWh (state)

0.4826

kg CO₂e / kWh

51%

Carbon-free

51%

Renewable

eGRID Subregions in Montana

Montana's ZIP codes fall in 3 eGRID subregions. These are the Scope 2 factors; use the ZIP-level API to get the one for each facility.

Generation Mix

kWh to CO₂ Calculator - Montana

Enter electricity consumption (kWh):

Using the NWPP subregion factor (635.267 lb CO₂e/MWh = 0.2882 kg/kWh), which covers 91% of Montana's ZIP codes; for other parts of the state look up the ZIP. Source: EPA eGRID2023.

How to Use Montana'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. Facilities in different parts of Montana are in different subregions - use the API to get the exact factor by ZIP code.

Other States Served by the Same Subregions (state rates)

Frequently Asked Questions

What is Montana's electricity emission factor?

For Scope 2 reporting, it depends on the ZIP: Montana's ZIP codes are in NWPP (635.267 lb CO₂e/MWh, 91% of ZIPs), MROW (926.552 lb CO₂e/MWh, 8% of ZIPs), RMPA (1042.539 lb CO₂e/MWh, 2% of ZIPs). EPA's state rate for plants in Montana is 1063.9 lb CO₂e/MWh, 38% dirtier than the US average.

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

Multiply the facility's annual kWh by the kg/kWh factor of its ZIP code's eGRID subregion 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 Montana's electricity grid?

Power plants in Montana generated 51% carbon-free and 51% renewable electricity in 2023. At 1064 lb CO₂e/MWh, the state rate is 38% 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

Subregion	Name	lb CO₂e/MWh	kg/kWh	Carbon-free	Share of MT ZIPs
NWPP	WECC Northwest	635.267	0.2882	58.25%	91%
MROW	MRO West	926.552	0.4203	51.34%	8%
RMPA	WECC Rockies	1042.539	0.4729	41.85%	2%

Montana Electricity Emission Factor 2023