Illinois Electricity Emission Factor 2023

EPA eGRID2023 Rev2 · 3 eGRID subregions · Very Dirty

Illinois's electricity grid has a CO₂e emission factor of 1030.4 lb/MWh (0.4674 kg/kWh) - 34% dirtier than the US average. The grid is 40% carbon-free and 22% renewable. These are the official EPA eGRID2023 values used for GHG Protocol Scope 2 location-based emissions reporting.

1030.4

lb CO₂e / MWh

0.4674

kg CO₂e / kWh

40%

Carbon-free

22%

Renewable

eGRID Subregions in Illinois

Illinois spans 3 eGRID subregions. Use the ZIP-level API to get the exact factor for each facility.

Subregion	Name	lb CO₂e/MWh	kg/kWh	Carbon-free	Rating
RFCW	RFC West	916.054	0.4155	36.04%	Dirty
SRMW	SERC Midwest	1248.582	0.5663	31.6%	Very Dirty
MROW	MRO West	926.552	0.4203	51.25%	Dirty

Generation Mix

Solar0.8%

Wind5.5%

Nuclear28.4%

Hydro1.0%

Natural Gas37.8%

Coal25.0%

Other Fossil0.7%

Generation mix shown for RFCW (primary subregion). See subregion pages for full breakdowns.

Electricity cost in Illinois

Latest monthly state-level average rate (EIA Form 861, 2026-04):

Sector	$/kWh
Residential	$0.2047
Commercial	$0.1389
Industrial	$0.0974
All sectors	$0.1431

State-level averages, not utility-specific tariffs. For exact pricing, check your utility's published rate schedule.

24-hour grid carbon profile

Average hourly CO₂e intensity across the last 7 days from PJM Interconnection (IL's balancing authority). Red = dirtiest, green = cleanest. Data: EIA-930 (~24h lag).

Hours in local standard time. Swing: 1.16× between cleanest (08:00 local) and dirtiest (21:00 local).

Read full guide on hourly grid carbon intensity →

Derived metrics for Illinois

Carbon cost of electricity: $493 per tonne CO₂e (residential rate ÷ grid intensity)
Annual per-capita CO₂e from electricity: 4,745 kg/yr (11.4k kWh × grid factor)
10,000 mi/yr EV emissions: 1247 kg CO₂e (at 0.30 kWh/mi)
Same miles in gas car: ~4,000 kg CO₂e (400 g/mi baseline)
EV vs gas savings: 69% cleaner
Grid trend 2018-2023: -22% (cleaner)

kWh to CO₂ Calculator - Illinois

Enter electricity consumption (kWh):

Using Illinois average: 1030.4 lb CO₂e/MWh = 0.4674 kg/kWh. 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 may be in different subregions - use the API to get the exact factor by ZIP code.

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

Compare with Other States

Arkansas

955 lb/MWh

Indiana

916 lb/MWh

Iowa

1088 lb/MWh

Kansas

1058 lb/MWh

Kentucky

910 lb/MWh

Michigan

1099 lb/MWh

Illinois

1030 lb/MWh

Frequently Asked Questions

What is Illinois's electricity emission factor?

Illinois's EPA eGRID2023 electricity emission factor is 1030.4 lb CO₂e per MWh (0.4674 kg per kWh). This is 34% dirtier than the US national average.

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

Multiply the facility's annual kWh consumption by 0.4674 to get kg CO₂e. Divide by 1,000 for metric tonnes. For facilities spanning multiple Illinois subregions, use the emission factors API to get the exact factor by ZIP code.

How clean is Illinois's electricity grid?

Illinois's grid is 40% carbon-free and 22% renewable. At 1030 lb CO₂e/MWh, it is 34% dirtier than the US average of 770.9 lb/MWh.

Get exact emission factors by ZIP code

33,616 ZIP codes · All 27 eGRID subregions · CO₂e, NOx, SO₂, generation mix

Read the API docs · Scope 2 calculation guide