EPA GHGRP · state profile · IL
Illinois - top-third state emissions
According to the EPA's Greenhouse Gas Reporting Program (GHGRP), an upper-third state rollup: 92.9M MT CO₂e from 299 facilities (#8 of 54 states).
- among states
- #8
- Total CO₂e - Large emitter
- 92.9M MT
- Facilities
- 299
- Companies
- 143
- Avg / facility - High intensity
- 311K MT
Data updated May 2026
Illinois reports 92.9M MT CO₂e from 299 EPA GHGRP facilities and 143 parent companies (#8 of 54 U.S. states by aggregated facility CO₂e), led by Vistra at 14.3M MT (~15% of the state total).
- #8 of 54 states
- Vistra 15.4% of state
- 3.6% of U.S. GHGRP total
- Avg 311K MT per facility · May 2026
In-state concentration desk
Vistra accounts for 15.4% of reported Illinois CO₂e (14.3M MT of 92.9M MT). The top three in-state reporters hold 32.3% (Vistra; PRAIRIE STATE ENERGY CAMPUS MANAGEMENT; PHILLIPS 66). Shares use EPA GHGRP facilities sited in IL only, not each parent's company-wide total.
- Illinois is 3.6% of the 2.57B MT U.S. GHGRP facility rollup across 54 jurisdictions.
- Leading EPA sector by CO₂e: Power Plants at 50.3% (46.7M MT across 62 facilities) - orthogonal to the facility-count sector mix below.
- Trails California by 10.2M MT on the same state ranking.
- Leads Alabama by 17.1M MT on the same state ranking.
Illinois vs all states by reported GHGRP CO₂e
Where this state's aggregated facility Scope 1 sits among every state and territory in the EPA GHGRP file (readout in million MT)
93 8th of 54 higher than 46 of 54 states
States and territories, banded by total reported facility CO₂e (MT)
Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA Greenhouse Gas Reporting Program · May 2026
Facility mix · EPA sector count
How 299 Illinois facilities split by EPA sector
Exclusive in-state facility counts by EPA industry_sector, orthogonal to the leading-parent CO₂e share lens above. Source: EPA GHGRP facility reports in Illinois.
Facility mix · Scope 1 size bands
How 299 Illinois facilities split by latest reported Scope 1
Exclusive in-state facility counts by latest reported Scope 1 size band, orthogonal to the EPA sector mix above. Source: EPA GHGRP facility reports in Illinois.
Largest corporate emitters in Illinois
Illinois - top corporate emitters (MT CO₂e)
Company footprint
Which companies combine scale and emissions?
Each point is a leading Illinois reporter. The crosshairs mark the median among the companies shown, so the chart distinguishes a larger facility footprint from a higher emissions total.
This is a comparison of the leading 12 reporters displayed above, not a measure of production, population, or total company-wide emissions outside Illinois.
Read the chart values
- Vistra 40 sites · 14.3M MT
- PRAIRIE STATE ENERGY CAMPUS MANAGEMENT 1 sites · 11.5M MT
- PHILLIPS 66 27 sites · 4.2M MT
- ARCHER DANIELS MIDLAND 18 sites · 3.9M MT
- EXXON MOBIL 24 sites · 2.6M MT
- Gulf Energy USA 1 sites · 2.5M MT
- NRG ENERGY 14 sites · 2.1M MT
- PDV AMERICA 4 sites · 1.9M MT
- MARATHON PETROLEUM 24 sites · 1.8M MT
- US STEEL 13 sites · 1.8M MT
- HARRISON STREET SOCIAL INFRASTRUCTURE FUND A 1 sites · 1.3M MT
- FORESIGHT ENERGY 2 sites · 1.2M MT
State insight: Illinois
Illinois (IL) reports 92.9M MT CO₂e from 299 EPA GHGRP facilities operated by 143 companies (#8 of 54 states by aggregated facility CO₂e). Per-facility average is about 311K MT. Power Plants leads the in-state CO₂e mix at 50.3%.
Upper-third emitters here include Vistra, PRAIRIE STATE ENERGY CAMPUS MANAGEMENT, PHILLIPS 66 (32.3% of the IL total). These are Scope 1 facility reports only - not a full state inventory or company-wide footprint. See methodology.
Largest corporate emitters in Illinois
Highest-emitting GHGRP facilities in Illinois
Nationwide peers for a top-third state rollup
Two EPA GHGRP peer sets for an upper-third state (92.9M MT): nearest CO₂e totals and facility-book matches beyond the in-state tables above.
Similar reported CO₂e
Nearest states by aggregated facility CO₂e (92.9M MT here).
Similar facility inventory
Nearest states by GHGRP reporting facility count (299 here).
State totals aggregate EPA Greenhouse Gas Reporting Program (GHGRP) facility reports sited in Illinois (IL). Figures reflect facility self-reporting, not a full state inventory. See our methodology. Retrieved and formatted by PlainCarbon
Related reading: Understanding corporate carbon reporting · All states · Methodology
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the EPA Greenhouse Gas Reporting Program (GHGRP). Consult a qualified professional before making decisions based on this data.