Illinois Electricity Emission Factor 2023

EPA eGRID2023 Rev2 · 3 eGRID subregions

Power plants in Illinois emitted 474.4 lb CO2e per MWh generated in 2023 (0.2152 kg/kWh), 38% cleaner than the US average, according to EPA's eGRID2023 state rate. Their generation was 68% 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.

474.4
lb CO2e / MWh (state)
0.2152
kg CO2e / kWh
68%
Carbon-free
14%
Renewable

eGRID Subregions in Illinois

Illinois'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.

SubregionNamelb CO2e/MWhkg/kWhCarbon-freeShare of IL ZIPs
SRMW SERC Midwest 1248.582 0.5663 31.62% 66%
RFCW RFC West 916.054 0.4155 36.06% 32%
MROW MRO West 926.552 0.4203 51.34% 1%

Generation Mix

Solar1.1%
Wind12.3%
Nuclear54.9%
Natural Gas16.0%
Coal15.3%

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

kWh to CO2 Calculator - Illinois

Using the SRMW subregion factor (1248.582 lb CO2e/MWh = 0.5663 kg/kWh), which covers 66% of Illinois's ZIP codes; for other parts of the state look up the ZIP. Source: EPA eGRID2023.

How to Use Illinois'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 Illinois 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)

Arkansas
998 lb/MWh
Indiana
1466 lb/MWh
Iowa
634 lb/MWh
Kentucky
1747 lb/MWh
Maryland
522 lb/MWh
Michigan
797 lb/MWh
Illinois
474 lb/MWh

Frequently Asked Questions

What is Illinois's electricity emission factor?

For Scope 2 reporting, it depends on the ZIP: Illinois's ZIP codes are in SRMW (1248.582 lb CO2e/MWh, 66% of ZIPs), RFCW (916.054 lb CO2e/MWh, 32% of ZIPs), MROW (926.552 lb CO2e/MWh, 1% of ZIPs). EPA's state rate for plants in Illinois is 474.4 lb CO2e/MWh, 38% cleaner than the US average.

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

Power plants in Illinois generated 68% carbon-free and 14% renewable electricity in 2023. At 474 lb CO2e/MWh, the state rate is 38% 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