CHICAGO O'HARE INTERNATIONAL AIRPORT
CHICAGO, IL · COOK COUNTY · NAICS 488119
Data updated May 2026
According to the EPA Greenhouse Gas Reporting Program, CHICAGO O'HARE INTERNATIONAL AIRPORT ranks #4,615 of 8,713 U.S. reporting facilities by latest reported CO₂e and #146 of 299 facilities in IL.
- National rank #4,615 of 8,713 GHGRP facilities
- #146 of 299 in IL
- #710 of 1,599 in Other
- 100% of CHICAGO DEPARTMENT OF AVIATION parent CO₂e
- 2023 mix: 0.1% non-CO₂ (N₂O-led)
- -19.1% since 2011
CHICAGO O'HARE INTERNATIONAL AIRPORT vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
43,687 4615th of 8713 higher than 4,098 of 8,713 facilities
GHGRP facilities, banded by latest reported CO₂e (MT)
Each bar is a band; taller bars hold more facilities. 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 · 2023
Facility footprint context
This site accounts for 100% of CHICAGO DEPARTMENT OF AVIATION reported parent CO₂e (44K MT of 44K MT ). Inside the EPA Other sector it ranks #710 of 1,599 facilities by latest CO₂e. Shares use GHGRP facility rollups only, not Scope 2/3 or non-reporting sites.
2023 gas mix desk
Of 44K MT CO₂e reported for 2023, non-CO₂ gases are 0.1% , led by N₂O at 0.1% . Component shares use this facility's GHGRP CO₂ / CH₄ / N₂O rows for that year (already CO₂e-weighted).
- CO₂
- 99.9%
- 44K MT
- CH₄
- 0.1%
- 23 MT
- N₂O
- 0.1%
- 32 MT
Emissions decline across reporting years
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 43,687 |
| 2022 | 44,153 |
| 2021 | 68,289 |
| 2020 | 56,915 |
| 2019 | 50,922 |
| 2018 | 48,033 |
| 2017 | 45,318 |
| 2016 | 48,833 |
| 2015 | 49,609 |
| 2014 | 55,527 |
| 2013 | 53,401 |
| 2012 | 36,852 |
| 2011 | 54,027 |
Facility insight: CHICAGO O'HARE INTERNATIONAL AIRPORT
CHICAGO O'HARE INTERNATIONAL AIRPORT (EPA GHGRP Facility ID 1005841) reported 44K metric tons of CO2-equivalent in 2023, operating in CHICAGO, IL within COOK COUNTY. Among GHGRP reporters it ranks #4,615 of 8,713 nationally by latest CO₂e and #146 of 299 in IL. The site is classified under Other with NAICS code 488119.
Across 2011–2023, annual CO₂e fell 19.1%; peak load was 68K MT in 2021. This facility has filed every year from 2011 to 2023, a complete 13-year record.
Peak year was 2021 at 68K MT CO2e; latest 2023 sits 36% below that peak (44K MT). The largest year-to-year move was 2021→2022 (-35.3%, 24K MT).
Frequently Asked Questions
Where does CHICAGO O'HARE INTERNATIONAL AIRPORT rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, CHICAGO O'HARE INTERNATIONAL AIRPORT ranks #4,615 of 8,713 reporting facilities by latest reported CO₂e, and #146 of 299 facilities in IL (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than CHICAGO O'HARE INTERNATIONAL AIRPORT? ▼
CHICAGO O'HARE INTERNATIONAL AIRPORT's 44K MT CO₂e is higher than 4,098 of the 8,713 GHGRP facilities with reported emissions (47%), an exact count from the full corpus, not an estimate.
How much CO2 does CHICAGO O'HARE INTERNATIONAL AIRPORT emit? ▼
CHICAGO O'HARE INTERNATIONAL AIRPORT reported 44K MT CO2e in 2023.
What share of CHICAGO DEPARTMENT OF AVIATION does CHICAGO O'HARE INTERNATIONAL AIRPORT represent? ▼
CHICAGO O'HARE INTERNATIONAL AIRPORT accounts for 100% of CHICAGO DEPARTMENT OF AVIATION's reported GHGRP CO₂e (44K MT of 44K MT).
What is CHICAGO O'HARE INTERNATIONAL AIRPORT's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.1% of reported CO₂e at CHICAGO O'HARE INTERNATIONAL AIRPORT, with N₂O the larger non-CO₂ share at 0.1% (CO₂ 99.9%). Shares use the facility's GHGRP gas components for that year.
Where does CHICAGO O'HARE INTERNATIONAL AIRPORT rank inside Other? ▼
Among EPA GHGRP facilities tagged Other, CHICAGO O'HARE INTERNATIONAL AIRPORT ranks #710 of 1,599 by latest reported CO₂e.
Is CHICAGO O'HARE INTERNATIONAL AIRPORT reducing emissions? ▼
Over 13 reporting years (2011–2023), CHICAGO O'HARE INTERNATIONAL AIRPORT's emissions have decreased by 19.1%. This suggests meaningful progress in emissions reduction.
Nationwide facilities with similar CO₂e or sector
Two GHGRP-derived peer sets for CHICAGO O'HARE INTERNATIONAL AIRPORT, both outside IL so the neighborhoods are not state-geo containment.
Similar reported CO₂e
Nearest latest-year facility totals outside IL (44K MT here).
Similar Other CO₂e
Nearest same-sector facility totals outside IL.