Arizona Electricity Emission Factor 2023

EPA eGRID2023 Rev2 · 2 eGRID subregions

Power plants in Arizona emitted 689.1 lb CO2e per MWh generated in 2023 (0.3126 kg/kWh), 11% cleaner than the US average, according to EPA's eGRID2023 state rate. Their generation was 42% carbon-free and 14% 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.

689.1
lb CO2e / MWh (state)
0.3126
kg CO2e / kWh
42%
Carbon-free
14%
Renewable

eGRID Subregions in Arizona

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

SubregionNamelb CO2e/MWhkg/kWhCarbon-freeShare of AZ ZIPs
AZNM WECC Southwest 706.189 0.3203 40.27% 93%
NWPP WECC Northwest 635.267 0.2882 58.25% 7%

Generation Mix

Solar6.6%
Wind1.6%
Nuclear28.2%
Hydro5.4%
Natural Gas47.2%
Coal10.8%

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

kWh to CO2 Calculator - Arizona

Using the AZNM subregion factor (706.189 lb CO2e/MWh = 0.3203 kg/kWh), which covers 93% of Arizona's ZIP codes; for other parts of the state look up the ZIP. Source: EPA eGRID2023.

How to Use Arizona'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 Arizona are in different subregions - use the API to get the exact factor by ZIP code.

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

Other States Served by the Same Subregions (state rates)

California
395 lb/MWh
Idaho
314 lb/MWh
Montana
1064 lb/MWh
Nevada
644 lb/MWh
New Mexico
774 lb/MWh
North Dakota
1298 lb/MWh
Arizona
689 lb/MWh

Frequently Asked Questions

What is Arizona's electricity emission factor?

For Scope 2 reporting, it depends on the ZIP: Arizona's ZIP codes are in AZNM (706.189 lb CO2e/MWh, 93% of ZIPs), NWPP (635.267 lb CO2e/MWh, 7% of ZIPs). EPA's state rate for plants in Arizona is 689.1 lb CO2e/MWh, 11% cleaner than the US average.

How do I calculate Scope 2 emissions for a Arizona 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 Arizona's electricity grid?

Power plants in Arizona generated 42% carbon-free and 14% renewable electricity in 2023. At 689 lb CO2e/MWh, the state rate is 11% cleaner 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